Tim McGraw and Keith Urban have confirmed performances at the iHeartRadio Music Festival in Las Vegas this fall. The event will take place Sept. 20-21 at the MGM Grand Garden Arena. Urban will appear on the first night, followed by McGraw on the final night. In addition, The Band Perry and Miley Cyrus are among the stars performing at the Village, a daytime stage at a new, outdoor music venue called the Lot. Those outdoor performances will take place Sept. 21. Tickets for the iHeartRadio Music Festival go on sale on Saturday (July 20).