The singer revealed that she didn't actually have to audition for the role in the film franchise. "I heard that they heard little clips of my voice with several different people and the producers heard it, and they weren't told who the voices were," she told Leno.

"I think it was from a radio show, because my voice is different when I do Smurfette from when I sing. When I sing, I wake up, I stretch, I do my lotions and potions and crystals and prayers. When I do Smurfette, it's a lot more raw and there are a lot more cracks in her voice. It's not thoroughly warmed up."

Perry was asked for an update on a new album, which would follow-up the 2010 smash, "Teenage Dream." Without giving a date, she said "soon," adding, "It will continually be what I always do, which is connecting to my core and bringing an honest message that people can relate to. Honesty is something everyone is looking for."