Flashback: Katy Perry Sings With Christian Nu-Metal Band P.O.D.

UPDATE: In response to other websites categorizing Katy Perry as a “backup singer” in reference to her collaboration with P.O.D., the band’s Marcos Curiel has shared the following statement with Rolling Stone: “This is revisionist history and disrespectful to our girl Katy who was NEVER a backup singer … We invited…