The Eagles canceled a pair of tour dates for June including the stop at Citizens Bank Park in Philadelphia on June 14, and a June 15 date at Hershey Stadium. Both shows were not selling well so the speculation is that they canceled because of poor ticket sales.
The Dixie Chicks and Keith Urban were performing at the concert as well and maybe the mix of country and rock just didn’t go over all that well. The high price of concert tickets seems to be taking it’s toll this year with the cancellation of Limp Bizkit’s tour as well. Shortly after tickets went on sale, the entire Limp Bizkit tour was postponed.