ones i recall:

Judas Priest
Ozzy
Iron Maiden
Rush (twice)
Van Halen (thrice)
Krokus
.38 Special
REM (twice)
Billy Squire
Foreigner
Dave Matthews
Def Lepard
Twisted Sister
The Firm (with Jimmy page)
Robert Plant
George Strait
there are more... jst dont remember them

I regret missing Pink Floyd - i had tickets and got in a fight with then GF. she went, i didnt. bitch
going to see RHCP soon