Listen to Katy Perry on iHeartRadio

Katy Perry performed as part of the iHeartRadio Live Series in New York City on July 24, 2009, and during her set she covered Queen's "Don't Stop Me Now." Fast forward four years, and both Katy Perry and Queen will be taking the stage at the 2013 iHeartRadio Music Festival in Las Vegas in September!

This week, Katy has been teasing the release of her new song, "Roar," which drops August 12. 

Watch Katy's performance of "Don't Stop Me Now" below.

PHOTOS © Brian Hineline / Retna Ltd. for iHeartRadio.