Filmmaker John Scheinfeld made his name directing documentaries about John Lennon and Harry Nilsson, but he's the first to admit that it's hard to pull off a great feature film about a famous rock star. "A lot of those movies try to do too much," he tells Rolling Stone. "They go cradle to grave and they're racing through scenes and they don't give dramatic moments their due. They also feel obligated to show the artist on stage, so you're seeing concert performances with an actor. As good as they are, they aren't the artist. We have an image of these people in our mind, and an actor just won't match up."