Nick Lachey and Vanessa Minnillo host a lavish haunted-mansion theme Halloween party for their close friends and family, at Nick's home in Bel Air.
Paris Hilton throws a Halloween party at her home in LA, and dresses herself and boyfriend Doug Reinhardt up as Dorothy from 'The Wizard of Oz'.
Isla Fisher dresses up as catwomen and takes her daughter Olive to a friends Halloween party in Hollywood, California.
Mickey Rourke dresses up for Halloween for a party at Club Voyeur in West Hollywood, CA.
Bai Ling out the night before Halloween dressed up as Andy Warhol in New York City.