The inaugural iHeartRadio Music Festival was on September the 23rd and 24th of 2011. What happened in Vegas didn't stay in Vegas! The biggest live music event in radio history featured performances from Lady Gaga, Steven Tyler, Jennifer Lopez, Kenny Chesney, Jay-Z, Coldplay, Rascal Flatts, Nicki Minaj, Sublime with Rome, David Guetta (with special guest Usher), The Black Eyed Peas, Kelly Clarkson, Bruno Mars, Carrie Underwood, Jane's Addiction, and Alicia Keys.
