iReport — Clear Channel Radio today announced the iHeartRadio Music Festival, a two-day music event hosted by Ryan Seacrest that will mark the biggest live concert festival in radio history.The extraordinary line-up will include: Lady Gaga, Coldplay, Alicia Keys, Steven Tyler, The Black Eyed Peas, Kenny Chesney, Jennifer Lopez, Carrie Underwood, Jane’s Addiction, Nicki Minaj, John Mayer, David Guetta, Rascal Flatts, Bruno Mars, Kelly Clarkson, Sublime with Rome and special performances from Usher and Sting, with more to be announced.To view Multimedia News Release, go to