Rihanna, Green Day, Usher and more rock Vegas at iHeart Radio festival

Psy brings 'Gangnam Style' to Sin City

By Dave Lewis Saturday, Sep 22, 2012 3:29 PM

Jason Aldean brings some country flavor to the fest

Jason Aldean brings some country flavor to the fest

The music star had the MGM Grand Arena on its feet. 

Photo Credit: AP Photo/Eric Reed