Haunted Homes of the Stars

The mansions of Adele, American Idol, Joan Rivers and more are inhabited by celebs and spirits alike

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No stage fright here! Adam Levine and his band mates recorded their 2007 album, It Won't Be Soon Before Long, in Harry Houdini's allegedly haunted Los Angeles home. Guitarist James Valentine even claims he saw a ghost on the stairs. "It must have been benevolent – I never felt any bad vibes," he told PEOPLE.