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The Samsung Galaxy Experience at Lollapalooza on August 3, 2013 in Chicago City. (Photo by Tasos Katopodis/Getty Images for Samsung Galaxy) ( 175555211 )

Kendrick Lamar performs during Lollapalooza at Grant Park on August 3, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Lindsey Troy of Deap Valley performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Justin Hayward-Young of The Vaccines performs during Lollapalooza 2013 at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175594890 )

Sky Ferreira looks on as DIIV performs during Lollapalooza 2013 at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175594884 )

Tegan Rain Quin of Tegan and Sara performs during Lollapalooza 2013 at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175577400 )

Zachary Cole Smith of DIIV performs during Lollapalooza 2013 at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175594875 )

Wade Shields of Chicago dances during Vampire Weekend's performance at the Lollapalooza Festival in Chicago, Sunday, Aug. 4, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen) ( Lollapalooza )

Ezra Koenig, lead vocalist of Vampire Weekend's performs at the Lollapalooza Festival in Chicago, Sunday, Aug. 4, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen) ( Lollapalooza )

Fans at the Perry's electronic music stage are sprayed with water as they await the next act on day 3 of Lollapalooza 2013 at Grant Park on Sunday, Aug.4, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP) ( Lollapalooza 2013 - Day 2 )

Fans at the Perry's electronic music stage await the next act on day 3 of Lollapalooza 2013 at Grant Park on Sunday, Aug.4, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP) ( Lollapalooza 2013 - Day 2 )

Alice Glass of Crystal Castles performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Fans wait for Crystal Castle to perform during Lollapalooza at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Julie Edwards of Deap Valley performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Fans dance as Baauer performs during Lollapalooza at Grant Park on August 3, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Joshua Tillman of Father John Misty performs during Lollapalooza at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

A woman hula hoops near the Perry's stage during Lollapalooza at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

A woman dances near the Perry's stage during Lollapalooza at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Kendrick Lamar performs on day 2 of Lollapalooza 2013 at Grant Park on Friday, Aug.3, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP) ( Lollapalooza 2013 - Day 2 )

CHICAGO, IL - AUGUST 03: Marcus Mumford of Mumford & Sons performs during Lollapalooza 2013 at Grant Park on August 3, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175468131 )

Fans react while Ellie Golding performs at the Lollapalooza Festival in Chicago, Saturday, Aug. 3, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen) ( Lollapalooza )

Ellie Goulding performs on day 2 of Lollapalooza 2013 at Grant Park on Friday, Aug.3, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP) ( Lollapalooza 2013 - Day 2 )

Festival attendees walk past a large Lollapalooza sign near the Buckingham Memorial Fountain at the Lollapalooza Festival in Chicago, Saturday, Aug. 3, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen) ( Lollapalooza )

CHICAGO, IL - AUGUST 03: Jordan Cook of Reignwolf performs during Lollapalooza 2013 at Grant Park on August 3, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175464064 )

CHICAGO, IL - AUGUST 03: Charles Bradley performs during Lollapalooza 2013 at Grant Park on August 3, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175464024 )

Cary Ann Hearst, left, and Michael Trent of the duo Shovels & Rope on day 2 of Lollapalooza 2013 at Grant Park on Saturday, Aug. 3, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP) ( CORRECTION Lollapalooza 2013 - Day 2 )

Ben Howard fans hold up a sign that says "You Brought Us To Lollapalooza" during his performance at the Red Bull Stage at the Lollapalooza Festival in Chicago, Saturday, Aug. 3, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen) ( Lollapalooza )

Jordan Cook of the Band Reignwolf performs on day 2 of Lollapalooza 2013 at Grant Park on Saturday, Aug. 3, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP) ( CORRECTION Lollapalooza 2013 - Day 2 )

Festival attendees wait for the next act to take the Red Bull Stage at the Lollapalooza Festival in Chicago, Saturday, Aug. 3, 2013. The more than two-decade-old festival opened Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen) ( Lollapalooza )

CHICAGO, IL - AUGUST 03: Shaun White of Bad Things performs during Lollapalooza 2013 at Grant Park on August 3, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175463795 )

CHICAGO, IL - AUGUST 03: Este Haim, Danielle Haim and Alana Haim of HAIM pose backstage during Lollapalooza 2013 at Grant Park on August 3, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175461846 )

Fans cheer while the band Nine Inch Nails performs at the Lollapalooza Festival in Chicago, Friday, Aug. 2, 2013. The more than two-decade-old festival opens Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen) ( Lollapalooza )

A crowd surfer in a wheel chair is helped over the barricade while the band Nine Inch Nails performs at the Lollapalooza Festival in Chicago, Friday, Aug. 2, 2013. The more than two-decade-old festival opens Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen) ( Lollapalooza )

Nine Inch Nails performs at the Lollapalooza Festival in Chicago, Friday, Aug. 2, 2013. The more than two-decade-old festival opens Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen) ( Lollapalooza )

CHICAGO, IL - AUGUST 02: Joe Goddard and Al Doyle of Hot Chip attend the Samsung Galaxy Artist Lounge at Lollapalooza on August 2, 2013 in Chicago City. (Photo by Neilson Barnard/Getty Images for Samsung Galaxy) ( 175335755 )

CHICAGO, IL - AUGUST 02: Dillon Francis attends the Samsung Galaxy Artist Lounge at Lollapalooza on August 2, 2013 in Chicago City. (Photo by Neilson Barnard/Getty Images for Samsung Galaxy) ( 175342155 )

CHICAGO, IL - AUGUST 02: Steve Aoki attends the Samsung Galaxy Artist Lounge at Lollapalooza on August 2, 2013 in Chicago City. (Photo by Neilson Barnard/Getty Images for Samsung Galaxy) ( 175342142 )

CHICAGO, IL - AUGUST 02: Adam Tune, Jr. Flo, and Adam Tune of Keys N Krates at the Samsung Galaxy Artist Lounge at Lollapalooza on August 2, 2013 in Chicago City. (Photo by Neilson Barnard/Getty Images for Samsung Galaxy) ( 175335745 )

CHICAGO, IL - AUGUST 02: Ryan Walker of the band Imagine Dragons attends the Samsung Galaxy Artist Lounge at Lollapalooza on August 2, 2013 in Chicago City. (Photo by Neilson Barnard/Getty Images for Samsung Galaxy) ( 175335716 )

CHICAGO, IL - AUGUST 02: Theophilus London at the Samsung Galaxy Artist Lounge at Lollapalooza on August 2, 2013 in Chicago City. (Photo by Neilson Barnard/Getty Images for Samsung Galaxy) ( 175335712 )

CHICAGO, IL - AUGUST 01: Kate Nash performs at the Billboard Lollapalooza 2013 Pre-Party at the Double Door on August 1, 2013 in Chicago, Illinois. (Photo by Erika Goldring/Getty Images) ( 175297964 )

CHICAGO, IL - AUGUST 02: (Editor's Note: Multiple exposeure made in camera) Trent Reznor of Nine Inch Nails performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175345496 )

CHICAGO, IL - AUGUST 02: (Editor's Note: Multiple exposeure made in camera) Trent Reznor of Nine Inch Nails performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175345444 )

CHICAGO, IL - AUGUST 01: Kate Nash performs at the Billboard Lollapalooza 2013 Pre-Party at the Double Door on August 1, 2013 in Chicago, Illinois. (Photo by Erika Goldring/Getty Images) ( 175297956 )

CHICAGO, IL - AUGUST 01: (L-R) Devon Portielje and Conner Molander of Half Moon Run perform at the Billboard Lollapalooza 2013 Pre-Party at the Double Door on August 1, 2013 in Chicago, Illinois. (Photo by Erika Goldring/Getty Images) ( 175297810 )

CHICAGO, IL - AUGUST 01: Erica Driscoll of Blondfire performs at the Billboard Lollapalooza 2013 Pre-Party at the Double Door on August 1, 2013 in Chicago, Illinois. (Photo by Erika Goldring/Getty Images) ( 175295833 )

CHICAGO, IL - AUGUST 02: Josh Homme of Queens of the Stone Age performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175338741 )

Alice Glass of the band Crystal Castles performs on day 1 of Lollapalooza 2013 at Grant Park on Friday, Aug. 2, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP) ( Lollapalooza 2013 - Day 1 )

Cullen Omori, lead vocalist for American indie rock band Smith Westerns performs at the Lollapalooza Festival in Chicago, Friday, Aug. 2, 2013. (AP Photo/Scott Eisen) ( Lollapalooza )

Bernard Sumner of the English rock band New Order performs on day 1 of Lollapalooza 2013 at Grant Park on Friday, Aug. 2, 2013, in Chicago. (Photo by Steve Mitchell/Invision/AP) ( Lollapalooza 2013 - Day 1 )

Alice Glass, vocalist for Canadian electronic band Crystal Castles performs during the Lollapalooza Festival in Chicago, Friday, Aug. 2, 2013. (AP Photo/Scott Eisen) ( Lollapalooza )

CHICAGO, IL - AUGUST 02: Alice Glass of Crystal Castles performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175333478 )

Fans at Lollapalooza Festival wait for the next act to begin in Chicago, Friday, Aug. 2, 2013. (AP Photo/Scott Eisen) ( Lollapalooza )

Zac Barnett, lead singer of American Authors performs at Lollapalooza in Chicago, Friday, Aug. 2, 2013. (AP Photo/Scott Eisen) ( Lollapalooza )

A man throws a frisbee as fans begin entering day 1 of Lollapalooza 2013 at Grant Park on Friday, August 2, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP) ( Lollapalooza 2013 - Day 1 )

Fans enter the Lollapalooza Festival in Chicago, on Friday, Aug. 2, 2013. The festival, which opens Friday, continues through Sunday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen) ( Lollapalooza )

Robert DeLong performs on day 1 of Lollapalooza 2013 at Grant Park on Friday, August 2, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP) ( Lollapalooza 2013 - Day 1 )

Dan Reynolds of the band Imagine Dragons performs on day 1 of Lollapalooza 2013 at Grant Park on Friday, Aug. 2, 2013, in Chicago. (Photo by Steve Mitchell/Invision/AP) ( Lollapalooza 2013 - Day 1 )

CHICAGO, IL - AUGUST 02: Dan Reynolds of Imagine Dragons performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175335175 )

Papa Emeritus II of the Swedish band Ghost BC performs on day 1 of Lollapalooza 2013 at Grant Park on Friday, Aug. 2, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP) ( Lollapalooza 2013 - Day 1 )

Lindsey Troy, left, and Julie Edwards of the rock duo Deap Valley performs on day 1 of Lollapalooza 2013 at Grant Park on Friday, Aug. 2, 2013 in Chicago. (Photo by Steve Mitchell/Invision/AP) ( Lollapalooza 2013 - Day 1 )

Festival attendees open umbrellas and put on ponchos while waiting for the band Smith Westerns to take stage during a brief rain shower at the Lollapalooza Festival in Chicago, Friday, Aug. 2, 2013. The more than two-decade-old festival opens Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen) ( Lollapalooza )

The Chicago skyline behind the Lollapalooza Festival while a rainstorm approaches in Chicago, Friday, Aug. 2, 2013. (AP Photo/Scott Eisen) ( Lollapalooza )

Fans watch Canadian electronic band Crystal Castles perform at Lollapalooza Festival in Chicago, Friday, Aug. 2, 2013. The more than two-decade-old festival opens Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen) ( APTOPIX Lollapalooza )

Fans raise their hands during a performance by rock band American Authors at the Lollapalooza Festival in Chicago, Friday, Aug. 2, 2013. The festival, which opened Friday, continues through Sunday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen) ( Lollapalooza )

Alice Glass, vocalist for Canadian electronic band Crystal Castles interacts with fans after jumping off stage during their performance at the Lollapalooza Festival in Chicago, Friday, Aug. 2, 2013. The more than two-decade-old festival opens Friday in Chicago's lakefront Grant Park. (AP Photo/Scott Eisen) ( APTOPIX Lollapalooza )

CHICAGO, IL - AUGUST 02: Alice Glass of Crystal Castles performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175333367 )

CHICAGO, IL - AUGUST 02: Caroline Hjelt and Aino Jawo of Icona Pop perform during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175329365 )

CHICAGO, IL - AUGUST 02: Aino Jawo and Caroline Hjelt of Icona Pop drink backstage during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175329330 )

CHICAGO, IL - AUGUST 02: Alice Glass of Crystal Castles performs during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175333379 )

CHICAGO, IL - AUGUST 02: Aino Jawo and Caroline Hjelt of Icona Pop pose backstage during Lollapalooza 2013 at Grant Park on August 2, 2013 in Chicago, Illinois. (Photo by Theo Wargo/Getty Images) ( 175329322 )

Reeves Gabrels of The Cure performs during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Robert Smith of The Cure perform during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Fans cheer as Knife Party performs during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Demi Kay, 19, hula hoops as she listens to Vampire Weekend performs during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Justin Hayward-Young of The Vaccines perform during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Ezra Koenig of Vampire Weekend perform during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

A fan crowd surfs as Wavves performs during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Nathan Williams of Wavves performs during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Vampire Weekend perform during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Wavves performs during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Wavves performs during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Fans pose for a photo next to the Perry's sign during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Sara Keirsten Quin of Tegan and Sara performs during Lollapalooza 2013 at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Sara Keirsten Quin of Tegan and Sara performs during Lollapalooza 2013 at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Baroness performs during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Ezra Koenig of Vampire Weekend perform during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Peter Adams of Baroness performs during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Eric Nelson, 22, during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Natalie Bergman of Wild Belle performs during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Fans cheer as Knife Party performs during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

A young fan walks out of the barricade after being pulled from the crowd as Knife Party performed during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Peter Adams of Baroness performs during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Angel Haze performs during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

John Baizley of Baroness performs during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Music fans wait to listen to "Foster the People" perform at the Lollapalooza music festival in Grant Park in Chicago in this file photo taken August 5, 2011. Lollapalooza, the three-day music festival in Chicago's historic Grant Park, was bigger than ever in 2013, with a lineup that honored its alternative rock roots and broadened its appeal to fans of folk, dance, rap and even country music. REUTERS/Jim Young/Files ( LOLLAPALOOZA/ )

Astro performs during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )

Robert Smith of The Cure perform during Lollapalooza at Grant Park on August 4, 2013 in Chicago, Illinois. (Photo by Seth McConnell/The Denver Post) ( Lollapalooza )