The 2015 iHeartRadio Country Festival will bring  together Country music's biggest superstars all on one stage at the Frank Erwin Center in Austin, Texas on Saturday, May 2. This year's incredible lineup will feature Tim McGraw, Brad Paisley, Rascal Flatts, Darius Rucker, Little Big Town, Dierks Bentley, Brantley Gilbert, Justin Moore, The Band Perry, iHeartRadio's On The Verge artist Sam Hunt and Tyler Farr