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File - Singer Whitney Houston (L) and Bobbi Kristina Brown arrives at the 2011 Pre-GRAMMY Gala and Salute To Industry Icons Honoring David Geffen at Beverly Hilton on February 12, 2011 in Beverly Hills, California. Houston was born August 9, 1963 in Newark, New Jersey and died February 11, 2012, in Beverly Hills, California at the age of 48. Bobbi Kristina died on July 26, 2015. (Photo by Jason Merritt/Getty Images) ( 63442787 )

Singer Whitney Houston poses backstage with her seven awards at the 21st annual American Music Awards in Los Angeles, Ca., Feb. 7, 1994. (AP Photo/Douglas Pizac) ( AMERICAN MUSIC AWARDS HOUSTON )

Artist Whitney Houston performs onstage at the 37th Annual American Music Awards on Sunday, Nov. 22, 2009, in Los Angeles. Houston was born August 9, 1963 in Newark, New Jersey and died February 11, 2012, in Beverly Hills, California at the age of 48. (AP Photo/Matt Sayles) ( APTOPIX 2009 AMA Awards Show )

Singer Whitney Houston shows her American Music Award, at the Shrine Auditorium in Los Angeles, Calif., Jan. 27, 1986. (AP Photo) ( American Music Awards Whitney Houston 1986 )

Singer Whitney Houston, right, sings with her daughter Bobbi Kristina Brown during a performance on 'Good Morning America' in Central Park on Tuesday, Sept. 1, 2009 in New York. Houston was born August 9, 1963 in Newark, New Jersey and died February 11, 2012, in Beverly Hills, California at the age of 48. Bobbi Kristina died on July 26, 2015. (AP Photo/Evan Agostini) ( Good Morning America Whitney Houston )

In this Sept. 30, 2010 file photo, singers Cissy Houston, left, and her daughter Whitney Houston arrive at the "Keep A Child Alive Black Ball" at the Hammerstein Ballroom in New York. (AP Photo/Evan Agostini, file) ( People-Cissy Houston )

File - Entertainer Whitney Houston strikes a pose during her performance at the Shrine Auditorium in Los Angeles, Monday, April 10, 2000, during taping of the "25 Years of #1 Hits: Arista Records' Anniversary Celebration." (AP Photo/Mark J. Terrill) ( WHITNEY HOUSTON )

Whitney Houston looks over her shoulder as her husband Bobby Brown looks to her at the premiere of "The Wonderful World of Disney" movie "Cinderella," at Mann's Chinese Theater in the Hollywood section of Los Angeles, Monday, Oct. 13, 1997. (AP Photo/Rene Macura) ( CINDERELLA )

Singer Whitney Houston poses at the Soul Train Awards in Los Angeles, Ca., March 23, 1987. (AP Photo) ( WHITNEY HOUSTON )

In this handout image provided by Disney Parks, Whitney Houston, Bobby Brown and their daughter Bobbi Kristina are greeted by Mickey Mouse and Minnie Mouse for the premiere of "The Princess Diaries 2" at the Disneyland Resort August 7, 2004 in Anaheim, California. (Photo by Lisa Rose/Disney Parks via Getty Images) ( 139024820_001 )

U.S singer Whitney Houston performs at the o2 in London as part of her European tour, Sunday, April 25, 2010. (AP Photo/Joel Ryan) ( Britain Whitney Houston )

U.S singer Whitney Houston performs at the o2 in London as part of her European tour, Sunday, April 25, 2010. (AP Photo/Joel Ryan) ( Britain Whitney Houston )

File - U.S. President George H. Bush shares a laugh with performer Whitney Houston in the Oval Office of the White House, Wednesday, May 2, 1990 in Washington. (AP Photo/Barry Thumma) ( President George H. Bush and Whitney Houston )

Producer Clive Davis shares a moment with singer Whitney Houston performs at the pre-Grammy gala & salute to industry icons with Clive Davis honoring David Geffen, Sunday, Feb. 13, 2011, in Beverly Hills, Calif. (AP Photo/Mark J. Terrill) ( Clive Davis Gala )

US soul star Whitney Houston (C) and her daughter walk hand in hand through an alley in the old city of Jerusalem 28 May 2003. (AFP/Getty Images) ( RPP2003052827992 )

In this Oct. 28, 2006, file photo, musician Whitney Houston arrives at the 17th Carousel of Hope Ball benefiting the Barbara Davis Center for Childhood Diabetes in Beverly Hills, Calif. Houston died Saturday, Feb. 11, 2012, she was 48. (AP Photo/Matt Sayles) ( Whitney Houston Obit )

Singer Whitney Houston performs during the German game show "Wetten Dass...?" (Bet it...?) in Freiburg, southwestern Germany, Saturday, Oct. 3, 2009. (AP Photo/Johannes Eisele, Pool) ( Germany TV Game Show Wetten Dass )

Whitney Houston and her husband Bobby Brown arrive for the Versace Fall 1998 fashion show in New York Saturday, March 28, 1998. (AP Photo/Mark Lennihan) ( FASHION VERSACE )

Recording artist Whitney Houston performs at the 2004 World Music Awards Wednesday, Sept. 15, 2004, at the Thomas and Mack Arena in Las Vegas. (AP Photo/Eric Jamison) ( 2004 WORLD MUSIC AWARDS )

Whitney Houston poses with her Grammy backstage at the Grammy Awards in Los Angeles, Ca., Feb. 26, 1986. Houston won best female pop vocal performance for her song "Saving All My Love For You." (AP Photo/Lennox McLendon) ( GRAMMYS WHITNEY HOUSTON )

Artist Whitney Houston receives the International Artist Award onstage at the 37th Annual American Music Awards on Sunday, Nov. 22, 2009, in Los Angeles. (AP Photo/Matt Sayles) ( 2009 AMA Awards Show )

American singer Whitney Houston belts out a song during her segment of a benefit concert at Boston Garden Saturday night on May 10, 1986. (AP Photo/Elise Amendola) ( WHITNEY HOUSTON )

Bobbi Kristina Brown attends the Premiere Of Tri-Star Pictures' "Sparkle" at Grauman's Chinese Theatre on August 16, 2012 in Hollywood, California. (Photo by Frederick M. Brown/Getty Images) ( 149344396FB026_Premiere_Of_ )

American singer Whitney Houston talks to the press following the third annual MTV Music Video Awards ceremony in Los Angeles, Ca. on Sept. 5, 1986. (AP Photo/Mark Avery) ( WHITNEY HOUSTON )

Singer Whitney Houston performs at New York's Madison Square Garden, Tuesday, Sept. 8, 1987. (AP Photo/Mario Suriani) ( WHITNEY HOUSTON )

Whitney Houston performs before a sellout crowd, Sunday, July 17, 1994, at the Rose Bowl in Pasadena, Calif. (AP Photo/Denis Paquin) ( 1994 World Cup Final )

Whitney Houston, right, and her husband, Bobby Brown, perform during the "VH1 Divas" duets show Thursday, May 22, 2003, in Las Vegas. (AP Photo/Joe Cavaretta) ( VEGAS DIVAS )

Rising star Whitney Houston is seen with music producer Clive Davis, in 1983, shortly after signing a contract with Arista Records. (AP Photo) ( WHITNEY HOUSTON )

Singer Whitney Houston, left, performs with Dionne Warwick at the pre-Grammy gala & salute to industry icons with Clive Davis honoring David Geffen, Sunday, Feb. 13, 2011, in Beverly Hills, Calif. (AP Photo/Mark J. Terrill) ( Clive Davis Gala )

Concession workers at the United Center, watch actor Kevin Costner eulogize Whitney Houston before an NBA basketball game between the Chicago Bulls and the New Jersey Nets, Saturday, Feb. 18, 2012, in Chicago. Houston died last Saturday at the Beverly Hills Hilton in Beverly Hills, Calif., at the age 48. (AP Photo/Charles Rex Arbogast) ( Whitney Houston Funeral )

Whitney Houston, right, thanks the crowd after being honored with a lifetime achievement award at the first BET awards Tuesday, June 19, 2001, at a hotel in Las Vegas. (AP Photo/Joe Cavaretta) ( BET AWARDS )

U.S. singer Whitney Houston smiles next to her husband Bobby Brown during her meeting with Israeli Prime Minister Ariel Sharon at the Prime Minister's residence in Jerusalem, Tuesday, May 27, 2003. (AP Photo/Pier Paolo Cito) ( MIDEAST ISRAEL HOUSTON )

Actress Lauren Bacall, left, greets Bobbi-Christina daughter of Bobby Brown, right, and Whitney Houston during the 4th Annual International Achievement In Arts Awards in Beverly Hills, Calif., Sunday, Oct. 11, 1998. (AP Photo/Michael Caulfield) ( INTERNATIONAL ACHIEVEMENT IN ARTS AWARDS )

Former World Heavyweight Boxing Champion Muhammad Ali is greeted by singer Whitney Houston as he arrives on stage at New York's Radio City Music Hall to accept a GQ "Men of the Year" Award Wednesday, Oct. 21, 1998. (AP Photo/Mitch Jacobson) ( GQ AWARDS )

U.S. singer Whitney Houston arrives at Incheon International Airport in Incheon, west of Seoul, South Korea, Wednesday, Feb. 3, 2010. (AP Photo/Lee Jin-man) ( South Korea Whitney Houston )

Clive Davis, second from left, poses with singers Alicia Keys, far left, Whitney Houston, second from right, and Ashanti before the Clive Davis Pre-Grammy Party in Beverly Hills, Calif., Saturday, Feb. 9, 2008. (AP Photo/Chris Pizzello) ( Clive Davis Pre-Grammy Party Arrivals )

(L-R) Singer Whitney Houston and Chief Creative Officer, Sony Music Worldwide, Clive Davis during the Whitney Houston "I Look To You" CD Listening Party held at the Beverly Hilton Hotel on July 23, 2009 in Beverly Hills, California. (Photo by Frank Micelotta/Sony Music) ( Whitney Houston "I Look To You" CD Listening Party )

FILE - In this April 19, 2008 file photo, singers Ray J, left, and Whitney Houston attend the Bernard Hopkins and Joe Calzaghe, of Britain, light heavyweight boxing match at the Thomas & Mack center in Las Vegas. (AP Photo/Isaac Brekken, file) ( People-Ray J )

Whitney Houston daughter Bobbi Kristina (R) attends the concert of Whitney Houston held at Mediolanum Forum on May 3, 2010 in Milan, Italy. (Photo by Vittorio Zunino Celotto/Getty Images) ( 60343512 )

(L-R) Chief Creative Officer, Sony Music Worldwide, Clive Davis and singers Whitney Houston and Stevie Wonder during the Whitney Houston "I Look To You" CD Listening Party held at the Beverly Hilton Hotel on July 23, 2009 in Beverly Hills, California. (Photo by Frank Micelotta/Sony Music) ( Whitney Houston "I Look To You" CD Listening Party )

Musician Whitney Houston arrives at the 17th Carousel of Hope Ball benefiting the Barbara Davis Center for Childhood Diabetes in Beverly Hills, Calif., Oct. 28, 2006. (AP Photo/Matt Sayles-File) ( People Houston )

In this Aug. 31, 2009, photo provided by Harpo Productions, television talk-show host Oprah Winfrey poses with Whitney Houston at the Town Hall in New York. (AP Photo/Harpo Productions, George Burns) ( People Houston Winfrey )

Singer Whitney Houston, right, sings with her daughter Bobbi Kristina Brown during a performance on 'Good Morning America' in Central Park on Tuesday, Sept. 1, 2009 in New York. Houston was born August 9, 1963 in Newark, New Jersey and died February 11, 2012, in Beverly Hills, California at the age of 48. Bobbi Kristina died on July 26, 2015. (AP Photo/Evan Agostini) ( Good Morning America Whitney Houston )

Performers, rehearsing a medley from "Waiting To Exhale, " go through the motions at New York's Madison Square Garden Sunday, Feb. 23, 1997. (AP Photo/Rick Diamond/NARAS, ho) ( GRAMMYS )

'Good Morning America' co-hosts Diane Sawyer, left, and Robin Roberts chat with singer Whitney Houston, center, during taping of 'Good Morning America' in Central Park on Tuesday, Sept. 1, 2009 in New York. (AP Photo/Evan Agostini) ( Good Morning America Whitney Houston )

FILE - In this Saturday, Jan. 16, 2010 file photo, Whitney Houston accepts an award at the Warner Theatre during the 2010 BET Hip Hop Honors in Washington. Houston died Saturday, Feb. 11, 2012, she was 48. (AP Photo/Nick Wass) ( Obit Whitney Houston )

Jennifer Hudson top, performs a tribute to Whitney Houston, left bottom, at the Warner Theatre during the 2010 BET Hip Hop Honors, Saturday, Jan. 16, 2010, in Washington. (AP Photo/Nick Wass) ( BET Hip Hop Honors )

Singer Whitney Houston, right, is seen with her husband Bobby Brown during their wedding, in this 1992 photo. (AP Photo) ( HOUSTON BROWN WEDDING )

FILE - In this April 25, 2010 file photo, singer Whitney Houston performs at the o2 in London as part of her European tour. (AP Photo/Joel Ryan, file) ( Whitney Houston-Investigation )

Jermaine Jackson, left, one of the Jackson brothers, is shown with singer Whitney Houston, during rehearsal for a segment of "As The World Turns, " July 25, 1984, in New York. (AP Photo/Marty Lederhandler) ( Jermaine Jackson And Whitney Houston 1984 )

Singer Whitney Houston presents an award at the BET Honors at the Warner Theatre on Saturday, Jan. 17, 2009 in Washington. (AP Photo/Evan Agostini) ( BET Honors Show )

Mariah Carey, left, and Whitney Houston perform their Oscar-nominated song, "When You Believe" from the movie "The Prince of Egypt," during the 71st Annual Academy Awards at the Dorothy Chandler Pavilion of the Los Angeles Music Center Sunday, March 21, 1999. (AP Photo/Eric Draper) ( OSCARS )

Pallbearers carry the casket of Whitney Houston to a hearse outside New Hope Baptist Church after funeral services on February 18, 2012 in Newark, New Jersey. Whitney Houston was found dead in her hotel room at The Beverly Hilton hotel on February 11, 2012. (Photo by Michael Nagle/Getty Images) ( 139112382MN050 )

Bobbi Kristina Houston arrives at Whigham Funeral Home for a private viewing for her mother Whitney Houston on February 17, 2012 in Newark, New Jersey. Whitney Houston was found dead in her hotel room at The Beverly Hilton hotel on February 11, 2012. (Photo by Paul Zimmerman/Getty Images) ( 139112399PZ070_Whitney_Hous )

Singer Jennifer Hudson performs at a taping of We Will Always Love You: A GRAMMY Salute To Whitney Houston on October 11, 2012 at the Nokia Theatre L.A. LIVE in Los Angeles, California. (Photo by Kevin Winter/Getty Images) ( 153635861KW003_We_Will_Alwa )

Madame Tussauds unveils four wax figures of Whitney Houston-- the first time four figures of the same individual have been simultaneously released-- on February 7, 2013 in New York City. (Photo by Jennifer Graylock/Getty Images for Madame Tussauds) ( 160563463AC00021_Madame_Tus )

The late Whitney Houston's daughter Bobbi Kristina (L) and date arrive for the world premiere of the film 'Sparkle' at Grauman's Chinese Theater in Hollywood,California on August 16, 2012. The film opens across the US on August 17. (FREDERIC J. BROWN/AFP/GettyImages) ( Was6804695 )

A general view of the program from the Whitney Houston funeral on February 18, 2012 in Newark, New Jersey. Whitney Houston was found dead in her hotel room at The Beverly Hilton hotel on February 11, 2012. (Photo by Bennett Raglin/Getty Images) ( 139112382BR002_Whitney_Hous )

One of the world's most popular US singer Whitney Houston, her husband, US singer Bobby Brown and their daughter Bobbi Kristina, arrive 11 October 1998 at the International Achievement in Arts Awards in Beverly Hills. Houston and Brown married in 1992. (LUCY NICHOLSON/AFP/Getty Images) ( PAR2004011469116 )

Whitney Houston performs at the 37th Annual American Music Awards on Sunday, Nov. 22, 2009, in Los Angeles. (AP Photo/Matt Sayles) ( 2009 AMA Awards Show )