'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


She once sang about a "Sk8er Boi" – but Avril Lavigne makes one punky racer girl! The singer combines sporty with flirty while partying at Hyde in West Hollywood in 2007.

Sign up for our daily newsletter and other special offers.
    Choose your newsletters
Thank you for signing up! Your request may take up to one week to be processed.
    see all newsletters