Who Can Forget the Costumes?

My The Domestic Witch's 2010 Halloween Blog Party entry for today is all about costumes.  Fun, silly, scary, serious or sexy, what would Halloween be without them?
         
Trick-or-treating, masquerade balls, costume parties, and costume contests--little princesses, goblins, pirates, cheerleaders, vampires, ninjas, and cowboys wandering up and down our streets, treat bags in hand, in the earlier hours of that special night.  Or their more sophisticated and sometimes sexier adult aspects which we see at parties, bars, and clubs throughout the week or so preceding the big night.  All of them are part of the magic.

I don't remember all of the costumes I've worn throughout the years, but a few of them stand out.  DH and I dressing as vampires and handing out sangria to parents out with their trick-or-treaters.  Going as the Christian devil while my DH went as the Christian god on Austin's famous (infamous) 6th Street.  Going as a ghost in a top-hat.  (It was the only way to keep the sheet from sliding.) 

There are others' costumes I remember, also.  The year a housemate went as a fairly elaborate Cleopatra.  My DH's boss' boss, who was about 6'2", dressed as Darth Vader, mask and all.  The little girl who came to the door as the Pink Power Ranger.

What was your most memorable costume?