Whitney Houston at the Third Annual International Achievement In Arts Awards

September 28, 1997

(Photo by Albert Ortega/Online USA, Inc.)

Whitney Houston performs at the MTV Europe Music Awards 1999

November 11, 1999

(Photo by Dave Hogan/Getty Images)

Whitney Houston arriving at the Clive Davis/Arista Party

(Photo: Dave Hogan/Getty Images)

Whitney Houston Husband Bobby Brown And Daughter

October 11, 1998.

(Photo By Dan Callister/Getty Images)

Whitney Houston attends the film premiere of "The Princess Diaries 2: Royal Engagement"

August 7, 2004

(Photo by Frederick M. Brown/Getty Images).

Whitney Houston visits Jerusalem's Old City

May 28, 2003

(Photo by Getty Images)

Whitney Houston onstage during the taping of "25 Strong: The BET Silver Anniversary Celebration"

(Photo by Vince Bucci/Getty Images)

hitney Houston sings the National Anthem before Super Bowl XXV

January 27, 1991

(Photo by George Rose/Getty Images)

Whitney Houston arrives at the 17th Annual Mercedes-Benz Carousel of Hope Ball

October 28, 2006

(Photo by Michael Buckner/Getty Images)

Whitney Houston is seen performing on stage during the 2004 World Music Awards

September 15, 2004

(Photo by Kevin Winter/Getty Images)

Whitney Houston arrives at the 17th Annual Mercedes-Benz Carousel of Hope Ball

October 28, 2006

(Photo by Michael Buckner/Getty Images)

Whitney Houston is seen performing on stage during the 2004 World Music Awards

September 15, 2004

(Photo by Pascal Le Segretain/Getty Images)

Whitney Houston sings during the closing ceremony of the World Cup 1994

Mandatory Credit: Billy Stickland/ALLSPORT

Whitney Houston arrives at the Legendary Clive Davis Pre-Grammy Party

February 9, 2008

(Photo by Vince Bucci/Getty Images)

Whitney Houston and Ray-J sit ringside

April 19, 2008

(Photo by John Gichigi/Getty Images)

Whitney Houston performs at the 2009 GRAMMY Salute To Industry Icons

February 7, 2009

(Photo by Kevin Winter/Getty Images)

Whitney Houston speaks during the 51st Annual Grammy Awards

February 8, 2009

(Photo by Kevin Winter/Getty Images)

Bobbi Kristina Brown and Whitney Houston perform on ABC's "Good Morning America"

September 1, 2009

(Photo by Larry Busacca/Getty Images)

Whitney Houston performs during the Wetten dass...?

October 3, 2009

(Photo by Miguel Villagran/Getty Images)

Whitney Houston accepts the Winner of International - Favorite Artist Award

November 22, 2009

(Photo by Kevork Djansezian/Getty Images)

Whitney Houston arrives at Incheon International Airport

February 3, 2010

(Photo by Chung Sung-Jun/Getty Images)

Whitney Houston performs at Mediolanum Forum

May 3, 2010

(Photo by Vittorio Zunino Celotto/Getty Images)

Whitney Houston Sighting In Berlin

May 12, 2010

(Photo by Toni Passig/Getty Images)

Whitney Houston performs live during a concert at the O2 World

May 12, 2010

(Photo by Jakubaszek/Getty Images)

Whitney Houston performs live during a concert at the O2 World

May 12, 2010

(Photo by Jakubaszek/Getty Images)

Whitney Houston attends the 2010 Keep A Child Alive's Black Ball

September 30, 2010

(Photo by Stephen Lovekin/Getty Images)

Whitney Houston, Singer Dionne Warwick and Bobbi Kristina Brown arrives at the 2011 Pre-GRAMMY Gala

February 12, 2011

(Photo by Larry Busacca/Getty Images For The Recording Academy)

Whitney Houston arrives at the 2011 Pre-GRAMMY Gala and Salute To Industry Icon

February 12, 2011

(Photo by Jason Merritt/Getty Images)

Whitney Houston attends the 2011 Pre-GRAMMY Gala and Salute To Industry Icons

February 12, 2011

(Photo by Larry Busacca/Getty Images For The Recording Academy)

Whitney Houston performs at the 2011 Pre-GRAMMY Gala and Salute To Industry Icons

February 12, 2011

(Photo by Kevork Djansezian/Getty Images)