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While Jimmy Kimmel is out this week, he’s having guest hosts fill in for him on his show. On Halloween night, Dave Grohl, of the Foo Fighters, was the guest host, and he appeared dressed as David Letterman (who looks suspiciously like Santa Claus), and interviewed the one and only Alice Cooper.

Alice Cooper then took the stage with the Foo Fighters backing him, and performed a medley of “Ballad of Dwight Fry” and “Killer”.