Whats the iest Halloween costume a female could possibly wear?

Single again for the first time in almost 3 yrs, so I want to have a fun and y night out on Halloween. I want something thats going to grab all the attention. So men, what is ur idea of the iest costume a girl can wear??? All ideas are appreciated!!!!! And please no female haters!! Im 24 and its the one night a yr where u can go out looking like a total tramp!! and I cant wait. =D