"Entertainer Shawn ""Jay-Z"" Carter smiles in between interviews, after a news conference at Philadelphia Museum of Art, Monday, May 14, 2012, in Philadelphia. The rapper announced plans for a two-day music festival in Philadelphia's at Fairmount Park, featuring nearly 30 acts ""that embody the American spirit"" on Labor Day weekend, Sept. 1 and Sept. 2, 2012. (AP Photo/Matt Rourke)"