Funny/popular halloween costume for teenage girl?

me and my friend wanna be somehing thats like a pair for halloween...but i hate how all the halloween csotume answers are the over-rated kinda stupid ideas like nerds, go-go girls, barbies, cheerleaders, witches, hannah montana, a cereal box and a cereal killer, and junk lke that SO PLEASE DONT SAY STUFF LIKE THAT. we want to dress up as things that are funnny and we dont really care what people think so it can be something guyish and retarded...cus we were thinkin of being justin biebers, harry potter and ron (its a joke!), snooki and jwoww, etc. DO U HAVE ANY OTHER IDEAS? NOTHING SLUTTY PLEASE AND NOTHING LITTLE GIRLISH. thanksss!