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Katy Perry must hate the Internet right now because there's an old-school video of her singing backup for P.O.D. (Yes, P.O.D.) making the rounds right now, and it's going to give you major Flashback Friday vibes.

Some lurking Internet-goer discovered a video of P.O.D.'s "Goodbye for Now" performance on "The Tonight Show with Jay Leno," and low and behold the pop titan is in the background. No word on when the number took place, but it had to be sometime around 2006 since the tune was off their Testify LP. Looks like there was more to Katy's Christian alt past than we originally thought.

Miss California Gurl hasn't specifically responded to the viral goodie, but she did take to Twitter on Thursday night (October 15) to share one very telling acronym.

katy perry twitter

However, one thing needs to be clear: Katy Perry was never an official backup singer for the band. Guitarist Marcos Curiel told Rolling Stone that the number was more of a collaborative effort. "This is revisionist history and disrespectful to our girl Katy who was NEVER a backup singer," he said. "We invited her to participate on our record as she was and is still is one of the few pop artists with strong musicianship roots."

Skip to the 3:24 mark to see Katy in action below!

Photo: Getty Images