Hollywood's Halloween Costumes: From Ghoulish to Glamorous, How the Stars Celebrate (Photos)

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Whether it’s trick-or-treating with the kids or attending a star-studded soiree, Oct. 31 is just another excuse for celebrities to play dress-up.

When the stars come out on Halloween night, anything goes.

Supermodel and Project Runway host Heidi Klum frequently makes headlines for her attention grabbing costumes, with 2011 being no exception. Klum was wheeled into her annual Halloween party at Tao Las Vegas on a bloody sheet donning a skin-tight body suit… sans skin.

PHOTOS: Hollywood's Scary, Sexy and Shocking Halloween Costumes

Jessica Alba opted for a classic witchy look, while Glee’s Lea Michele paid tribute to Natalie Portman. See what Hollywood was wearing for All Hallows’ Evening in THR’s scary, sexy and shocking gallery.

PHOTOS: The Most Glamorous Celebrity Costumes of All Time

But if old Hollywood glamour is more your style, click through 5 of the most glamorous celebrity costumes of all time, courtesy of the new Assouline book, Bals: Legendary Costume Balls of the Twentieth Century. Among the most memorable photographs are Mia Farrow and Frank Sinatra at Truman Capote’s famous Black and White Ball, a scantily clad Brigitte Bardot, and a giant camel.