Super Bowl IX halftime show, January 12, 1975 at Tulane Stadium (New Orleans, Louisiana). Performing: Mercer Ellington & Grambling State University Marching Bands. Theme: Tribute to Duke Ellington. Produced by Jim Skinner. Mercer Kennedy Ellington was an American musician, composer, and arranger. His father was Duke Ellington, whose band Mercer led for 20 years after his father's death. Wiki link Super Bowl IX: Wiki link