When it comes to potential for satire, E. L. James's she-porn best seller "50 Shades of Grey" seems as easy a target as you could shake a sex toy at. That said, this exuberant takeoff handily delivers the goods, barreling along with a score steeped in show tunes, R&B, gospel, Gilbert and Sullivan, and lyrics packed with references to various practices and orifices. "This is real life; this isn't a book," says Ana, the show's heroine, to her tycoon suitor. "If it was, it would be terrible." It certainly would. But "50 Shades!" is a musical parody, and a very entertaining one (1:30).