Grammy-winning pop legend and actress Whitney Houston, 48, was found dead on February 11, 2012 in a Beverly Hills hotel, police said. Photo/FILE

Atmosphere at the Apollo Theatre on the streets of Manhattan on February 11, 2012 in New York City.

Dated September 30, 2010 filed photo shows US singer Cissy Houston and daughter singer Whitney Houston attending the 2010 Keep A Child Alive's Black Ball at the Hammerstein Ballroom in New York City. Stephen Lovekin / Getty Images / AFP / FILES

Dated September 1, 2009 filed photo shows US singer Whitney Houston performing on ABC's "Good Morning America" in New York City. Larry Busacca / Getty Images / AFP / FILES

A file picture taken on May 2, 1994 in Washington shows US singer Whitney Houston (L) posing with the then US President George Bush at the White House. AFP PHOTO/JEROME DELAY

Singer Whitney Houston hugs presenter Samuel L. Jackson on receiving the International Artist of the Year award at the 2009 American Music Awards in Los Angeles, California November 22, 2009. Photo/FILE

Dated March 10, 1988 filed photo shows US pop star and entertainer Michael Jackson (2R) gathers with Elizabeth Taylor (L), Liza Minnelli (2L) and Whitney Houston (R) at the United Nego College Fund dinner at a New York hotel, in New York. AFP PHOTO/Mark CARDWELL / FILES

US singer Whitney Houston performing on ABC's "Good Morning America" in New York City on September 1, 2009.

US singer Cissy Houston (left) and daughter singer Whitney Houston attending the 2010 Keep A Child Alive's Black Ball at the Hammerstein Ballroom in New York City on September 30, 2010.

Whitney Houston holding her Grammy Award for Best Female Rhythm and Blues Vocal Performance for "It's Not Right but It's Okay" at the 42nd Annual Grammy Awards in Los Angeles on February 23, 2000.

Whitney Houston singing at the ceremony dedicating the new Arthur Ashe Stadium at the USTA National Tennis Center at the US Open in Flushing Meadows, NY on August 25, 1997.

Whitney Houston (right) poses with husband, singer Bobby Brown (left) at Eighth Annual Soul Train Music Awards on March 15, 1995

Whitney Houston (C) and her husband Bobby Brown (L) with Israeli Prime Minister Ariel Sharon at his residence in Jerusalem on May 27, 2003

Whitney Houston performing during the 2011 Pre-Grammy Gala and Salute to Industry Icons, with Clive Davis Honouring David Geffen at the Beverly Hilton, Beverly Hill on February 12, 2011