Katy Perry entered the music world with “I Kissed a Girl” and has since become a “Teenage Dream,” released a 3-D movie, “Part of Me,” and her latest album, “Prism,” is set to “Roar” on the music charts.
Dec. 12, 2008 Katy Perry and Carson Daly shoot a promo for NBC’s New Year's Eve broadcast. Earlier that year, Perry released “One of the Boys,” her first pop album. She had previously recorded a gospel album using the name Katy Hudson. Virginia Sherwood/NBC Buy Photo