Pop princess and actress Hilary Duff looks great, probably because she's, like,12 (no, not really--she's actually 19), but it's not just down to her youthfulness -- she also works hard to maintain her shape. Shape magazine has profiled some of Duff's fitness moves that help keep her looking her best. And because of wonderful technology, you can actually watch these moves and steal them by visiting this website.

Duff's also admitted she's a big fan of 80's dance music while she's working out. What do you listen to?