People.com's Halloween Party

Trick-or-Treat! Hollywood Suits Up for Halloween

See how Jimmy & Mindy, Melissa McCarthy, the Affleck family and more are getting into the spooky spirit of the season

JENNIFER, JC & MATTHEW

Jennifer Morrison, JC Chasez and Matthew Morrison enjoy an additional 15 minutes of fame Oct. 26 as Clueless's Cher, a Baywatch lifeguard and Andy Warhol, respectively, at Matthew Morrison's 4th Annual Halloween Masquerade party in Hollywood. The Dos Equis-sponsored event also brought out the likes of Ashlee Simpson, Brittany Snow and Chace Crawford.