Watch Renowned Pianist Play Mozart Concerto From Memory After Realizing Onstage That She Prepared the Wrong Piece In 1999, the renowned Portuguese pianist Maria João Pires was set to perform for a full-house audience of 2,000 at Concertgebouw in Amsterdam. She was tapped last minute to replace another musician for the open rehearsal, featuring Mozart and Mahler pieces to be conducted by Riccardo Chailly. Everything seemed to be going smoothly at first—until […] READ: Watch Renowned Pianist Play Mozart Concerto From Memory After Realizing Onstage That She Prepared the Wrong Piece