Xanadu uproariously sends up Olivia Newton-John’s notorious 1980 film of the same name, in which a feather-haired Greek muse with an Australian accent descends from Mount Olympus to modern-day California to help a hunky young man open a roller disco. Never has a movie begged more for parody – and Xanadu delivers with delicious wit, pure fun and classic disco songs that will have you believing in magic and humming all the way home.