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

Whitney Houston comes to the screen in "Sparkle" -- six months after she drowned in a bathtub in Beverly Hills. She's latest in a long list of stars who've had movies released after their death. Some of those movies featured iconic performances that seemed to define everything the star stood for. Other were... unfortunate, to say the least. Which will "Sparkle" be for Whitney? Only time will tell.