People.com's Halloween Party

Silly, Sexy, Cool : Star Halloween Costumes!

From Mariah's naughty firefighter to Kim's Wonder Woman, see how celebs reveal their alter egos

1 of 28

MARIAH CAREY & NICK CANNON

The husband and wife went coordinated this year, first as a carton of milk and some (very sexy) cookies, and then as a fireman and (what else?) his very sexy mate at a Halloween bash they hosted at N.Y.C. hot spot Marquee.
Boo! Hollywood's Real Ghost Hunters!

Boo! Hollywood's Real Ghost Hunters!

Is Leighton a fraidy-cat? Does Anna believe in ghosts? Find out who jumps at things that go bump in the night!

See Photos