Y - Yazz.

Z - ZZ Top

A ~ Alison Moyet

B - Beyonce

C -Coldplay

D - Damien Rice

E. Emerson, Lake & Palmer

F - The Faders

G - Green Day

H Hanson

I. Ian Anderson

J - Junoon

K - Kelly Clarkson

L - LaRissa

M ~ Michael Jackson

N - Neyo

O - Oasis

P - Prodigy
Q - Queens Of The Stone Age
R - Rolling Stones
S - Sex Pistols
T - Thin Lizzy
U - U2
V - Vice Squad
W - Wreckless Eric
X - X-Ray Spex
Y - Yardbirds
Z - Zounds
A - Abba
B - Black Sabbath
C - Crass
D - Dead Kennedys
E - Eagles
F - Free
G - Garbage
H - P J Harvey
I - Iggy Pop
J - Joy Division
K - Kaiser Chiefs
L - Led Zeppelin
M - Metallica
N - New Order
O - Omega Tribe

Which brings us back to P your turn lol

Just a footnote, i think that individuals singers should obviously be listed alphabetically by their surname. It's normally how things are done aka the way of the world lol.

P - Paul Young.

Q - Queen

R ~ Rod Stewart

S - Sarah Connor

T - Texas

U - Urge Overkill

V - Velvet Revolver