🤦 It's probably every musician's worst nightmare: imagine yourself sitting on stage ready to play a concerto and the orchestra begins to perform a completely different piece...😮 That's exactly what happened to the great Maria João Pires in 1999 when she stepped in to replace another pianist on short notice. In a formidable tour de force performance, Pires changed course and miraculously didn't miss a beat of Mozart's Piano Concerto No. 20 (and not No. 23 like she had been expecting!) alongside Riccardo Chailly and the Concertgebouworkest. 🤦