As Count Rackula can tell you, Halloween is the sexiest day of the year. Women take to the streets in barely-clad get-ups, nip slips abound, and pursed lips are rimmed with blood and/or candy corn.

After being slightly miffed that sultry songbirds Christina Aguilera and Gwen Stefani both dressed as decidedly unsexy fried eggs this year, Mariah Carey and the juicy-assed Kim Kardashian have more than made up for this gaffe by strutting their stuff last night in some of the skimpiest costumes we've seen in years!

Kim channeled legendary beauty Lynda Carter and dressed as Wonder Woman. God only knows how she got that ripe rump into the teeny superheroine suit, but Kim's definitely putting the "asso" in "magic lasso".

Mariah Carey decided to don a NYFD uniform . . . well, just the jacket. Thankfully, she opted to go strictly Mariah underneath with a fire engine red bra and booty shorts combo. It's a good thing Mariah comes equipped to put out fires, because she just started on in our pants . . . whoops, the hose is going off.