Madonna will perform at the iHeartRadio Music Awards ! Now it’s official. Directly from iHeart.com Madonna will all perform along with Taylor Swift, Rihanna, Iggy Azalea, Sam Smith, Jason Aldean, Jamie Foxx, Meghan Trainor, Jason Derulo, Jennifer Hudson, Kelly Clarkson, Snoop Dogg, Nate Ruess, Alesso and Florida Georgia Line. The 2015 iHeartRadio Music Awards air live Sunday, March 29th at 8pm ET/PT on NBC, and will be broadcast simultaneously on iHeartMedia stations nationwide and across the iHeartRadio digital music platform.