Let's see, I've seen:
Garth Brooks
Tim McGraw
Reba
The Judds
Wynonna
Queens Ryche - don't ask
Crosby Stills & Nash - most memorable for what happened after
Lionel Hampton
Count Basie
Neil Diamond
Lynyrd Skynyrd
Melissa Etheridge
Black Crows
Back Street Boys - took my girls
I can't think of the rest