Post the first artist in your itunes for every letter of the alphabet:
a-A Tribe Called Quest
b-B.J. Thomas (sings "Raindrops Keep Falling on My Head")
c-Caetano Veloso
d-D'Angelo
e-E.L.O.
f-Fabolous
g-G. Love and Special Sauce
h-Handsome Boy Modeling School
i-I'm From Barcelona
j-J.J. Johnson
k-K-Ci and JoJo
l-Ladysmith Black Mambazo
m-M. Ward
n-N.E.R.D.
o-O-Zone
p-Paco de Lucia (something off the Life Aquatic soundtrack?)
q-Q and not U
r-R. Kelly
s-Sade
t-T.
Rex
u-U2
v-Van Morrison
w-The Walkmen
x-X
y-Yann Tiersen
z-The Zambonis