Last year I was
Buttercup from the PowerPuff Girls. Of course, I was at work, and it was me and all the boys that night. None of them would dress up as the other 2 with me. Aargh.. stupid boys!

(And yes, we adults dress up at work.)
My friend is going as a Miss America this year.. complete with sash and tiara. I can't wait to see her. My other friend is probably going to be a Viking. I haven't thought of one yet.