Going to a costume party tonight and having not given the thing much forethought don't even know what I'm going as yet. But it got me thinking of some of the costumes of my past. What was your best costume EVER?

One year my roommate and I went as old ladies. I borrowed a frumpy old dress from my mom, picked up a wig from goodwill (and had it cleaned--ick), and a cane, got some support hose and padded them 'til the dress fit. Add sensible shoes and some heavy makeup and I was actually mistaken for an old woman while in my early twenties. That costume won me $250.