What should I be for Halloween this year?

So, I want to go y, but not ish. I'm a petite girl, very slender and I have nice legs that could pull off something short. Small chested though, so nothing for busty chicas. I did a biker-chick sort of thing last year and I'd rather not do that again. Originality is best if possible, but I'm up for any suggestions. Gimme a link if you can. Thanks! :D