OK, so Halloween has finally landed. But if you've been too busy to spend all your spare time concocting the perfect ensemble, there's still time to nail your lewk with the help of these stars. Luckily, Hollywood started celebrating the big night last weekend, which means there's endless inspiration from babes like Cindy Crawford and Ashley Madekwe – and there's no reason to go as a sexy librarian (unless you're into that, of course). Boo-tiful looks ahead!