What Should I Be For Halloween?

I found out yesterday that my super cute friend Sarah is going to have another Halloween party. Hooray! The dilemma is going to be coming up with a cool costume. Last year I was a cat (what is it with me and cats lately?), so I'll need to find something new and improved this year. Decisions, decisions. Any and all suggestions are welcome. :) See, even the Build-a-Bear animals found costumes...I'm way behind!