Jennifer Hudson performs "I Will Always Love You" during a tribute to the late Whitney Houston during the Grammy Awards show on Sunday. (Associated Press)
Whitney Houston performs onstage at the 37th Annual American Music Awards in Los Angeles on Nov. 22, 2009. The cause of the singer's death on Saturday is under investigation. (Associated Press)
Whitney Houston sings with her daughter, Bobbi Kristina Brown, during a performance on "Good Morning America" in Central Park in New York on Sept. 1, 2009. From the mid-1980s to the late 1990s, Miss Houston was one of the world's best-selling artists. (Associated Press)
Whitney Houston performs during the Billboard Awards at the MGM Grand in Las Vegas on Dec. 7, 1998. (AP Photo/Las Vegas News Bureau)
In this Sunday, Nov. 22, 2009, file photo, Artist Whitney Houston performs onstage at the 37th Annual American Music Awards in Los Angeles. Houston died Saturday, Feb. 11, 2012, she was 48. (AP Photo/Matt Sayles, File)
