It's that time again! Some of the biggest names in Hollywood stepped out to celebrate Halloween 2013, dressed as film characters, other A-listers, comic superheroes and much more! Check out some stars -- including Hilary Duff, Vanessa Hudgens and John Stamos -- who went the extra mile to get decked out for some of the biggest Halloween parties of the season.
Melissa McCarthy and Sandra Bullock
Incognito! The Heat costars Melissa McCarthy and Sandra Bullock went undercover as fishermen with heavy beards while taking Bullock's son Louis (dressed as a skeleton) out for some candy in Toluca Lake, Calif. on Oct. 31, 2013.