Everybody knows that the only thing celebs love more than dressing up is hitting a hot party, so Halloween was the perfect holiday for big celebrations on the east and west coasts this weekend. Heidi Klum's annual fete was the epic event in New York on Halloween night, as models, actors, and rock stars all hit the Dream Downtown hotel for a night full of creepy-crawly fun.

Klum, the mistress of ceremonies and a longstanding Halloween enthusiast, sported her second costume of the year at her shindig, as she also attended a party in Las Vegas during over the weekend. Never to be outdone, the German model appeared for the first time as a skinned human body, her body paint revealing the muscles, tendons, and tissues of the human form.

"My inspiration was just to be dead," said Klum, who was wheeled onto the Vegas nightclub floor on a gurney with a blood-spotted white sheet draped over her. The makeup job was done by Bill Corso, the Hollywood makeup artist who worked on X-Men: The Last Stand and Planet of the Apes.

And apes were the inspiration for Klum's next costume at her New York party. The model and her singer husband, Seal, appeared at their own event wearing head-to-toe ape costumes that were so convincing it was impossible to tell the duo's real identity underneath.

Other celebrity Halloween hits included Nicole Richie, who attended Kate Hudson's Halloween bash in Hollywood dressed as Jennifer Lopez, wearing high-heeled lace-up boots, a bright pink velour jumpsuit, and oversized sunglasses and gold hooped earrings, reports EW. Glee's Lea Michele (pictured) donned the whole Black Swan theatre getup, looking eerily like Natalie Portman in the film, and Jennifer Love Hewitt and her new boyfriend, Jerod Einsohn, hit the town as Angelina Jolie and Brad Pitt, carrying dolls to represent the supercouple's large brood of kids.

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