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

Comedian Chris Farley had hits with "Tommy Boy," "Black Sheep" and "Beverly Hills Ninja," but his drug and alcohol problems delayed filming on his last movie, "Almost Heroes." Those drug problems killed him -- he died of an overdose at the end of 1997. "Almost Heroes" came out five months later, to wretched reviews.