Long before she set off any fireworks or even before she roared, Katy Perry was a lesser-known backup singer for the Christian heavy metal group P.O.D. In a newly resurfaced music video for the group’s song “Goodbye for Now,” Perry, now 30, makes a cameo belting out the emotional lyrics.<br />PHOTOS: Katy Perry's music video looks<br />And it wasn’t a one-time-only thing. When the group performed on The Tonight Show with Jay Leno around the same time, the “Firework” singer also provided backup vocals.<br />Katy Perry in POD's video Goodbye for Now<br />Katy Perry in POD's video Goodbye for Now<br />Perry grew up with evangelical minister parents and has been very open about her religious upbringing. She even began her career as a gospel singer, using her given name, Katy Hudson.<br />PHOTOS: Katy Perry's craziest style moments<br />"Sometimes when children grow up, their parents grow up," she told Vanity Fair in 2011. "Mine grew up with me. We coexist. I don't try to change them anymore, and I don't think they try to change me. We agree to disagree. They're excited about (my success)."<br />PHOTOS: Katy's hair evolution<br />Watch the clip and tell Us what you think of Perry’s backup vocals now!
