There are 75 band references in this picture
 

http://www.chinternet.co.uk/75bands.jpg

i have found:

Rolling Stones
Guns'n'Roses
U2
Scissor Sisters
Dead Kennedys
Smashing Pumpkins
Matchbox 20
Alice In Chains
Blind Melon
Lemonheads
Sex Pistols
B52s
Black Flag
The Eagles
Iron Maiden
Men at Work
The BeeGees
The Black Crowes.
Led Zeppelin
Gorillaz
Talking Heads
White Snake
White Zombie ( is that a band? )
TATu
Radiohead

The Pixies.

Is the one up top Jet? Does that count?

Blur
Cornershop

i'd say it does

the eels
dinosaur jr
the police
the cars
hole
greenday
red hot chilli peppers
50 Cent

Garbage
And i think I found Deep Purple if its in there.

you don't know white zombie? is that even possible?

prince
beach boys

queen and the gorillaz, maybe!

you already said gorillaz though! :<

Phish :O

could that be calendar days? or is august 21st a reference to another band?

uh, postal service!

The Eagles

august 21st is greenday. if they were more clever they'd put it on 4/20 :smoke

madonna

i am curious as to who the hell the yellow man is supposed to be

my girlfriend says seal's in there

eminem

jewel, maybe?

pink floyd, maybe. I DUNNO ;(

dead kennedys
ratt
stereohead

that's RADIOHEAD >:

goldie?

red hot chili peppers
cowboy junkies
korn
b-52's

august 21st is me b-day.

Current Count: 52

who are the guys with the guitar cases supposed to be?

the roots?

styx?
and kevin says there's a band called yellow.