Wynona Ryder as Lydia Deetz in Bettlejuice
This is a pretty awesome look to channel in everyday life, but it's also a great Halloween costume. Just put on every piece of black clothing you own (oversized, if possible), add a sour attitude, and you're good to go! If you have some black fabric lying around, make yourself a choker. Girls with bangs can use a curling iron and a bit of gel to achieve her signature look: First, curl your bangs under to make them appear shorter, then run some gel through to get that choppy, almost greasy effect. Sounds gross, but if you work it with confidence, this is an easy costume that looks like it took weeks of planning. And always, always use eyeliner.

Photo: Courtesy of Geffen Company.