A- Alice In Chains
B- Black Label Society
C- Cage The Elephant
D- Deftones
E- Explosions In The Sky
F- Faith No More
H- Helmet
I- Incubus
J- Jimi Hendrix
K- KoRn
L- LIVE
M- Mars Volta
N- Nine Inch Nails
O- One Day As A Lion
P- (A) Perfect Circle
Q- Queens of the Stone Age
R- Rage Against The Machine
S- Soundgarden
T- Tool
U-....crap nothing
V- Van Halen
W- (The) White Stripes
X-...nothing
Y- Yeah Yeah Yeahs
Z- ZZ Top

Alkaline Trio
The Beatles
Chevelle
Dream Theater
Elvis Presley
Frank Sinatra
Green Day
House of Heroes
Johnny Cash
Kutless
Led Zeppelin
Muse
Nickel Creek
The Offspring
Phil Keaggy
Quasi
Red
Switchfoot
Thrice
Underoath
Vampire Weekend
The White Stripes
x - ?
Yes
z - ?

And One
Benny Benassi/Benassi Bros.
Cut Copy
Daft Punk
Exodus
Firehouse
Guns & Roses
Heathen
Iron Maiden
Judas Priest
Kajagoogoo
Louis La Rouche
Metallica
New Order
Oasis
The Prodigy
Queens of the Stone Age
Ratt
Sublime
Tesla Boy
Ultrabeat
Vincent De Moor
Whitesnake
Xe-NONE
YBZ
Zombienation
311 (yes I'm adding a number band section)

Aerosmith
Black Sabbath
Chris Bell
Dan Deacon
Escape The Fate
Fenriz' Red Planet
Girls
Hollywood Undead
I Set My Friends On Fire
Japanese Voyeurs
The Kooks
Lily Allen
Mindless Self Indulgence
NeverShoutNever
Offspring
Paloma Faith
Rainbow
Sick Puppies
These Are They
Uffie
Vampire Weekend
Wounds

Thinking about it, this has been done before! Where the f is it?!

A - Arcade Fire
B - Beirut
C - Coil
D - The Doors
E - Einstürzende Neubauten
F - Frank Zappa
G - Gang of Four
H - Howlin' Wolf
I - Iggy Pop and the Stooges
J - Joy Division
K - King Crimson
L - Leonard Cohen
M - The Mars Volta
N - Nick Cave and the Bad Seeds
O - ohGr
P - Patti Smith
Q - Queen? idfk
R - Richard Hell & the Voidoids
S - The Smiths
T - Tom Waits
U - The Unicorns
V - The Velvet Underground
W - Wilco
X -
Y - Yo La Tengo
Z - Zazen Boys

It was pretty hard choosing between bands. :[

A - Arctic Monkeys
B - The Beatles
C - Coldplay
D - David Bowie
E - Empire of the Sun
F - Florence + the Machine
G - Gipsy Kings
H - High Places
I - Imogen Heap
J - Jet
K - The Kinks
L - Lady Gaga
M - MGMT
N - Nancy Sinatra
O - Oasis
P - Phoenix
Q - Queen
R - Rolling Stones
S - Sam Sparro
T - The Turtles
U - U2
V - Vampire Weekend
W - We Are Scientists
X -
Y - Youth Group
Z - ZZ Top

Couldnt think of a X sorry.

A- AC/DC (Of Course)
B- Black Sabbath
C- Creedence Clearwater Revival
D- The Doors
E- Eric Clapton (Solo)
F- Foo Fighters
G- Guns N' Roses
H-
I- Iron Maiden
J- Jimi Hendrix
K- Kiss
L- Led Zeppelin
M- Misfits
N- Nazareth
O- Ozzy Osbourne
P- Pink Floyd
Q- Queen
R- The Rolling Stones (This was a hard one)
S- Steve Miller Band
T- Tom Petty & The Heartbreakers
U- UFO
V- Van Halen
W- The Who
Y- Y&T
Z- ZZ Top

A - Animal Collective
B - Bear In Heaven
C - Cream
D - The Doors
E - Eels
F - Flaming Lips
G - Glint
H - High Places
I - Imogen Heap
J - Jimi Hendrix/Jeff Buckley
K - King Crimson
L - Led Zeppelin
M - Muse
N - Nick Drake
O - Of Montreal
P - Pink Floyd
Q - Queens of the Stone Age
R - Radiohead
S - Sonic Youth, as of now
T - Talking Heads
U - The Unicorns
V - The Vines
W - Wolfmother
X - The xx
Y - Yeah Yeah Yeahs
Z - ZZ Top