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Actress/singer Jennifer Lopez and recording artist Pitbull perform onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492097697 )

Models Kendall Jenner (L) and Kylie Jenner attend the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492064195 )

Recording artists Charli XCX (L) and Iggy Azalea perform onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492097879 )

Singer Olga Kay attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492016213 )

Jennifer Lopez performs on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Chris Pizzello/Invision/AP) ( 2014 Billboard Music Awards - Show )

Magician Criss Angel attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492064485 )

Singer Lorde performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492065853 )

Model Amber Rose attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492064205 )

Rapper 2 Chainz performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492077177 )

Singer Kelly Rowland attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492043071 )

Recording artist Ariana Grande performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492077419 )

Singer Jason Derulo performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492076709 )

Recording artist Ricky Martin (C) performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492064221 )

Musician Lindsey Stirling poses in the press room during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492076545 )

Singer Jason Derulo (2nd from right) performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492077237 )

TV personality Andi Dorfman attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492031711 )

Michael Clifford, from left, Luke Hemmings and Calum Hood, of the musical group 5 Seconds of Summer, perform on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Chris Pizzello/Invision/AP) ( 2014 Billboard Music Awards - Show )

Singer Claudia Leitte attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492036023 )

Luke Bryan accepts the award for top country song for ìCrash My Partyî at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Chris Pizzello/Invision/AP) ( 2014 Billboard Music Awards - Show )

Recording artist Ryan Tedder of OneRepublic performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492040439 )

Caroline Boyer, left, and Luke Bryan arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by John Shearer/Invision/AP) ( 2014 Billboard Music Awards - Arrivals )

Recording artist Dan Reynolds of Imagine Dragons performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492052489 )

Shakira arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by John Shearer/Invision/AP) ( 2014 Billboard Music Awards - Arrivals )

Singer Shakira performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492065733 )

Matthew Hicks attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492019961 )

Shania Twain presents the award for top rock album at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Chris Pizzello/Invision/AP) ( 2014 Billboard Music Awards - Show )

Natasha Bedingfield arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by John Shearer/Invision/AP) ( 2014 Billboard Music Awards - Arrivals )

Recording artist Luke Hemmings of 5 Seconds of Summer performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492052835 )

Singer Jason Derulo performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492077393 )

Recording artist Shania Twain speaks onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492040467 )

Recording artist Michael Clifford of 5 Seconds of Summer performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492098381 )

Shakira performs at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Chris Pizzello/Invision/AP) ( 2014 Billboard Music Awards - Show )

Recording artists Charli XCX (L) and Iggy Azalea perform onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492077447 )

Singer Robin Thicke performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492097093 )

Singer Billy Ray Cyrus attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492036591 )

Ricky Martin performs on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Chris Pizzello/Invision/AP) ( 2014 Billboard Music Awards - Show )

Singer Carrie Underwood (hair detail) attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492064675 )

Imagine Dragons guitarist Ben McKee performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492097897 )

Jordin Sparks arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by John Shearer/Invision/AP) ( 2014 Billboard Music Awards - Arrivals )

Musicians Ryan Tedder, Brent Kutzle and Zach Filkins of OneRepublic perform onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492097965 )

Singer/actress Jennifer Lopez performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492096979 )

Ke$ha poses in the press room at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Eric Jamison/Invision/AP) ( 2014 Billboard Music Awards - Press Room )

Recording artist Luke Bryan (C) and Florida Georgia Line members Brian Kelley (L) and Tyler Hubbard (R) perform onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492098005 )

Actress Sarah Hyland attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492031191 )

Recording artists Miranda Lambert (L) and Carrie Underwood perform onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492065195 )

Rapper Wiz Khalifa attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492036963 )

Chrissy Teigen, left, and John Legend arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by John Shearer/Invision/AP) ( 2014 Billboard Music Awards - Arrivals )

Guitarist Michael Clifford, singer Luke Hemmings, drummer Ashton Irwin and guitarist Calum Hood of 5 Seconds of Summer perform onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492118863 )

Carrie Underwood, left, and Miranda Lambert arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by John Shearer/Invision/AP) ( 2014 Billboard Music Awards - Arrivals )

Jason Derulo performs on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Chris Pizzello/Invision/AP) ( 2014 Billboard Music Awards - Show )

Recording artist Ariana Grande performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492052849 )

Recording artist Luke Bryan (C) and Florida Georgia Line members Brian Kelley (L) and Tyler Hubbard (R) perform onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492098175 )

Singer Nicki Minaj attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492052843 )

Recording artists Charli XCX (L) and Iggy Azalea perform onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492077455 )

Jennifer Lopez accepts the icon award at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Chris Pizzello/Invision/AP) ( 2014 Billboard Music Awards - Show )

Luke Bryan, center, and from left, Brian Kelley and Tyler Hubbard, of the musical group Florida Georgia Line, perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Chris Pizzello/Invision/AP) ( 2014 Billboard Music Awards - Show )

Chrissy Teigen, left, and John Legend arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by John Shearer/Invision/AP) ( APTOPIX 2014 Billboard Music Awards - Arrivals )

Wayne Sermon, left, and Dan Reynolds, of the musical group Imagine Dragons, perform at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Chris Pizzello/Invision/AP) ( APTOPIX 2014 Billboard Music Awards - Show )

Singer Estelle attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492043051 )

Singers Ricky Martin (L) and Iggy Azalea speak onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492096905 )

Carrie Underwood, left, and Miranda Lambert arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by John Shearer/Invision/AP) ( APTOPIX 2014 Billboard Music Awards - Arrivals )

Ricky Martin performs on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Chris Pizzello/Invision/AP) ( 2014 Billboard Music Awards - Show )

Josh Groban, from left, Brad Paisley, Ke$ha and Ludacris pose in the press room at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Eric Jamison/Invision/AP) ( 2014 Billboard Music Awards - Press Room )

Ben McKee, from left, Daniel Platzman, Dan Reynolds and Wayne Sermon, of the musical group Imagine Dragons, poses in the press room with the award for top rock album for "Night Visions" at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Eric Jamison/Invision/AP) ( 2014 Billboard Music Awards - Press Room )

Musicians Brian Kelley (L) and Tyler Hubbard of Florida Georgia Line attend the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492031175 )

Singer Ricky Martin attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492031937 )

Rapper 2 Chainz (shoe detail) attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492053047 )

Singer Kelly Rowland (L) and news personality Shaneen Quarles speak onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492076509 )

Musician Lindsey Stirling (shoe detail) attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492037025 )

Singer Charli XCX poses in the press room during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492051841 )

LAS VEGAS, NV - MAY 18: (L-R) Recording artists Jennifer Lopez, Pitbull, and Claudia Leitte perform onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492039473 )

Producer L.A. Reid poses in the press room during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492077623 )

Actress Sarah Hyland (L) and recording artist Lindsey Stirling speak onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492064571 )

Brian Kelley, left, and Tyler Hubbard, of the musical group Florida Georgia Line, arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by John Shearer/Invision/AP) ( 2014 Billboard Music Awards - Arrivals )

Josh Groban presents the award for top female artist to Katy Perry at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Chris Pizzello/Invision/AP) ( 2014 Billboard Music Awards - Show )

Ben McKee, from left, Dan Reynolds, Wayne Sermon and Daniel Platzman, of the musical group Imagine Dragons, arrive at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by John Shearer/Invision/AP) ( 2014 Billboard Music Awards - Arrivals )

Lorde accepts the award for top new artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Chris Pizzello/Invision/AP) ( 2014 Billboard Music Awards - Show )

Ludacris poses in the press room at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Eric Jamison/Invision/AP) ( 2014 Billboard Music Awards - Press Room )

Recording artist Ricky Martin (C) performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492064633 )

Recording artists Austin Mahone (L) and Cher Lloyd speak onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492065779 )

Recording artists Brian Kelley (L) and Tyler Hubbard of Florida Georgia Line accept the Top Country Song for 'Cruise' onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492065871 )

Producer Jerome 'J-Roc' Harmon attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492065969 )

Host Ludacris speaks onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492065975 )

Recording artist Calum Hood of 5 Seconds of Summer performs onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492066057 )

Musicians Tyler Hubbard (L) and Brian Kelley of Florida Georgia Line, winners of Top Country Song for 'Cruise,' pose in the press room during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images) ( 492077495 )

Recording artist Snoop Dogg speaks onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492097127 )

Recording artist Lorde accepts the award for Top New Artist onstage during the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) ( 492097141 )

Kesha arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by John Shearer/Invision/AP) ( 2014 Billboard Music Awards - Arrivals )

2 Chainz arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by John Shearer/Invision/AP) ( 2014 Billboard Music Awards - Arrivals )

Miranda Lambert performs on stage at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 18, 2014, in Las Vegas. (Photo by Chris Pizzello/Invision/AP) ( 2014 Billboard Music Awards - Show )