The Steelers Country Music Festival, scheduled to be headlined by Brad Paisley at Heinz Field in Pittsburgh, has been postponed, according to a notice on the Pittsburgh Steelers' official website. The May 28 concert was to have also featured Blake Shelton, Darius Rucker and Jerrod Niemann. No reason for the postponement was announced, but the message on the website said more details will be available soon about rescheduling the event. Ticket refunds will be made from the place of purchase. Paisley's H2O II tour is now scheduled to launch June 3 in Virginia Beach, Va., with Shelton, Niemann, Sunny Sweeney and newcomers Edens Edge and Brent Anderson. The Steelers Country Music Festival was one of three country concerts scheduled this summer at Heinz Field. Taylor Swift will perform there on June 18, and Kenny Chesney and the Zac Brown Band will headline at the stadium on July 2.