The fourth annual iHeartRadio Music Awards will feature a star-studded line-up including Katy Perry, Ed Sheeran, The Chainsmokers, Shawn Mendes, Thomas Rhett, Noah Cyrus and Big Sean, who join already announced performer Bruno Mars.
The awards will be hosted by Ryan Seacrest, host of "On Air with Ryan Seacrest" on Sunday, March 5 at the historic Forum in Los Angeles.
“The biggest artists in music show up each year,” said Ryan Seacrest.