Mozart's Requiem is a classical musical composition (Requiem in D minor, K. 626) by Wolfgang Amadeus Mozart, not a performer or live act. All search results show various orchestras, choirs, and concert organizations (Grant Park Music Festival, Los Angeles Master Chorale, New Jersey Symphony, Music of the Baroque, Seattle Pro Musica, etc.) performing this 18th-century work. No artist or group named 'Mozart's Requiem' exists as a performer.