FILE - In this Thursday, Oct. 17, 2013 file photo, U.S. pop star Madonna smiles during her visit at the "Hard Candy Fitness" center in Berlin. It’s official: Madonna will perform at the Grammy Awards on Sunday, Jan. 26, 2014. A Friday news release from The Recording Academy had no other details about the seven-time Grammy winner’s appearance, however, which has been a rumor for some time. (AP Photo/Michael Sohn, file)