Probably 1967. I think they had a high school marching band.
http://www.superbowl.com/features/entertainment/entertainment-honorroll
XXXI
"Blues Brothers Bash" featuring Dan Akroyd, John Goodman and James Belushi. Also featuring "The Godfather of Soul" James Brown and ZZ Top.
lol...and when I was a kid, the Superbowl had those bloody Up With People shows...