Alicia Keys Performs Emotional Tribute at Whitney Houston's Funeral (VIDEO)
Watch Alicia's moving performance in the video above.
Another celebrity in attendance was Kevin Costner, who starred in 1992's The Bodyguard with Houston, and he spoke about his fond memories of the late singer. The actor even shared a few on-set stories -- one of which was Whitney's audition for the big role.
Costner recalled a fond memory of Whitney in which the makeup she'd put on minutes before her big audition had melted off because of the studio's bright lights. Costner said Whitney had removed the studio's makeup she had on and instead used her own.
"She seemed so small and sad at that moment and I asked her why she did it. She said, 'I just wanted to look my best,'" he recalled. "If Whitney could hear me now, I'd say you weren't enough, you were great ... People just didn't like you, they loved you."