Now that the Grammys are over, it's time to look forward to the next major musical moment of 2017. The iHeartRadio Music Awards has announced that it has added Katy Perry and Ed Sheeran to its performance lineup. They will be performing along with, The Chainsmokers, Shawn Mendes, Thomas Rhett, Noah Cyrus, Big Sean, and Bruno Mars. The event will be hosted by Ryan Seacrest and will air live on the Forum in Los Angeles on Sunday, March 5.