A-Andre Nickatina
B-Beastie Boys
C-Common
D-Dr Dre
E-Elvis
F-Fat boy slim
G-Gangstarr
H-House of Pain
I-Immortal Technique
J-Jimi Hendrix
K-Kanye West
L-Lightheaded
M-Mac Dre
N-N.W.A.
O-Outkast
P-Pink Floyd
Q-Queen
R-Radiohead
S-Slum Village
T-Talib Kweli
U-Usher
V-Van Halen
W-Weezer
X-Xmen!
Y-Young Buck
Z-Zzzzz

I made up one or 2 and some were copied, but hey, snakes on a plane happens.