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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

KATY PERRY

"Every cloud has a smoky gray lining," as Jane Lane would say, and Perry looks the part, accompanied by Daria, played by real-life best friend Shannon Woodward, at a Los Angeles party.