WATCH: That Time Katy Perry Collaborated With Nu Metal Band P.O.D.

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Now this is something worthy of a #FlashbackFriday hashtag.

Remember the 2000s? Well, while the rest of us were busy wearing neckties for belts and going through some sort of an emo phase, Katy Perry — then going by Katy Hudson — was singing with Christian rock band, P.O.D.

That’s right. The girl we now associate with cotton candy-colored wigs and whipped cream boobs once sang with the band that brought you “Youth of the Nation.” Perry collaborated with P.O.D. on their 2006 hit “Goodbye for Now” and even appeared in the official music video.

Though many publications are now calling Perry’s stint with the band as a background vocalist gig, guitarist Marcos Curiel insists that it was a mutual collaboration (despite the fact that Perry is literally singing in the shadows of frontman Sonny Sandoval during the group’s late night performance on the Tonight Show).

“This is revisionist history and disrespectful to our girl Katy who was NEVER a backup singer,” Curiel says in a recent statement. “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 … She paid her dues not as a backup singer but in a van going town to town. This is the problem with music journalism today … Shabby reporting. No research. No history.”

Either way, it makes for a great throwback. Watch Perry’s performance with P.O.D. on the Tonight Show — above.