Movie life after death: Whitney Houston in 'Sparkle' and more posthumous film roles

Aaliyah's film career was just gaining steam when she died in a plane crash in the Bahamas. She had just finished filming her starring role as Queen Akasha in the Anne Rice adaptation "Queen of the Damned," and she had several other film roles lined up. One of those roles? The lead in Whitney Houston's new version of "Sparkle."