Here's a few bands that played on the same bill as Brian's band:

Roland Kirk
Joe Cocker
Cream
Manfred Mann
Spencer Davis Group
Rolling Stones
Pink Floyd
The Who
Bee Gees
Tom Jones
The Monkees
Frank Zappa
Led Zepplin
Emerson Lake and Palmer
Herbie Hancock's Headhunters
Chick Corea Return to Forever
Earth Wind and Fire
The Crusaders
Blue Oyster Cult
ZZ Top
Kiss
Rush
Styx
Steppenwolf
Journey
Bruce Springsteen
Chicago
Mahavishnu Orchestra
Art Blakey's Jazz Messengers
Dizzy Gillespie's Big Band
Grand Funk Railroad
Eddie Harris
Chaka Khan
Johnny Winter
Edgar Winter
Jefferson Starship
Santana
The Allman Brothers
Ten Years After
Blood Sweat and Tears
Junior Walker
The Neville Brothers
Chuck Berry
BB King
The Doors
Bo Diddley
Jerry Lee Lewis
Maceo Parker