The Queen of Pop & Chart Slayer of 2013 Katy Perry Performs at the iHeartRadio Festival

One of the most-anticipated performances of Friday night’s iHeartRadio Music Festival was Katy Perry — and she didn’t let us down! The “Roar” singer treated fans to a medley of some of her biggest hits, including “California Gurls,” “Firework,” “Part of Me,” and “Teenage Dream,” as well as the first single off her Prism album and another new track, “Dark Horse” with Juicy J. -

She performed some of her many #1 hits: I Kissed A Girl, Dark Horse, Part Of Me, Wide Awake, California Gurls, Teenage Dream, Firework, Roar