The Pittsburgh Symphony Orchestra has a rich history of great guest performers - May 1-3 that tradition continues with Paul Shaffer! Band leader for David Letterman on his late night shows.. music director of the Rock & Roll Hall Of Fame Induction Ceremonies.. and Artie Fufkin from This Is Spinal Tap! Paul is bringing legendary singer & songwriter Valerie Simpson to perform as well! Get your tickets now! Just click the pic below! Maybe he'll do his Cher 'O Holy Night' impression!