People.com's Halloween Party

Haunted Hollywood! Star Costumes of 2012

From Selena Gomez's pretty kitty to Miley Cyrus's hip-hop transformation, see famous faces in this year's disguises

JENNIFER LOPEZ & CASPER SMART

How about a little peace and J. Love? Lopez and her beau don't let a little thing like being on a world tour stop them from celebrating Halloween, rocking some serious flower power all the way from Oberhausen, Germany.