News broke earlier this week that Katy Perry was once a backup singer for the Christian alternative metal band P.O.D., contributing vocals to their 2006 song "Goodbye For Now" and even performing with the band on "The Tonight Show With Jay Leno."
You can see KP (rockin' high boots and gripping the mic) most clearly around the 3:30 mark here:
But as we've pointed out before, Katy's had a long, storied career that actually began before her big breakthrough in 2007 with "I Kissed A Girl." She was a Christian songwriter herself (under the name Katy Hudson) and popped up on stray tracks and in music videos for other artists' songs. Katy kept busy, it's clear.
Here's a quick look at what she did in the direct lead-up to her big '07 arrival with "I Kissed A Girl."
"Smile" (from "The Sisterhood Of The Traveling Pants")
Katy apparently recorded this song in 2003, but it didn't see any release until the film's soundtrack came out in 2005.
Mick Jagger - "Old Habits Die Hard"
Katy provided background vocals for this song, which was written and included in the 2004 Jude Law film "Alfie" and won a Golden Globe for Best Original Song in 2005. No cameo in the video, though. Bummer.
Carbon Leaf - "Learn To Fly"
Katy didn't sing on this one, but she appeared as this 2006 video's protagonist and even flashed that patented Perry smile at the end. So, that's something.
Gym Class Heroes - "Cupid's Chokehold"
Katy played singer Travie McCoy's on-screen boo in this 2005 video while she was also being his off-screen boo at the same time. Check out that dreamy-eyed gaze at 3:39!