From Mariah's naughty firefighter to Kim's Wonder Woman, see how celebs reveal their alter egos
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See the Jo Bros, Lauren Conrad and more stars play Halloween dress-up before they were stars!
Is Leighton a fraidy-cat? Does Anna believe in ghosts? Find out who jumps at things that go bump in the night!
From Ugly Betty to Bret Michaels, see your funniest and best looks
People Special
Ducks, skeletons, lions – oh my! See how adorable a first Halloween can be
Trick or (doggie) treat? These cuties are begging for attention. Plus: Send us your pics!
Find out what outfits Lauren Conrad, Taylor Swift, Chris Brown and more stars will be wearing this Halloween!
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Who's got a sweet tooth? From Twix to Pixy Stix, find out what treats Katherine, Ashlee and more are craving
What was Leighton hiding? Who fought zombies? Who tortured Katherine Heigl? See how well you know their scariest roles!
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"I'm not a babysitter," says singer whose Good Morning America appearance is cancelled
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Plus: Avril parties in South Beach with a new guy, Hayden chats up Deryck Whibley and more
