Paul Williams could only have happened in the 1970s. Short, with curly lips that made him look like a smirky Little Lord Fauntleroy, he was a fixture on talk shows, a cheeseball actor, and the deeply gifted composer of melancholy pop like "Rainy Days and Mondays." Then he burned out on drugs. In Stephen Kessler's doc, he's a humbled man who regrets the spoiled child he once was. The movie is fascinating, though it smacks its own lips a bit too much at the tackiness of freak '70s stardom. B+

