The idea is to order your iTunes or other music player alphabetically by song title, and then list the first song and artist for each letter.
A - "Accentuate the Positive" by Bing Crosby and Sonny Tufts
B - "Babes in Abyss" by Deadsy
C - "Cage" by HIM
D - "D&D" by Stephen Lynch
E - "Early in the Morning" by Peter Paul and Mary
F - "Face" by BECK
G - "GLM" by ThouShaltNot
H - "Half a Man" by Stephen Lynch
I - "I'll Cover You" from RENT
J - "Jack's Lament" from The Nightmare Before Christmas
K - "Ka-boom Ka-boom" by Marilyn Manson
L - "L.A. Women" by Billy Idol
M - "Mad World" from Donnie Darko
N - "Nabbed" from The Nightmare Before Christmas
O - "O'Brien" by The Fables
P - "Paddy on the Railway" an irish drinking song
Q - "Quintessence" by the Soil Bleeds Black
R - "Radio in a Hole" by Smile Empty Soul
S - "S-conscious" by Malice Mizer
T - "Take Me Away" by Christina Vidal
U - "Ultimate Showdown of Ultimate Destiny" by Lemon Demon
V - "Vampires" by Godsmack
W - "Wait" from Sweeney Todd
X - None
Y - "Yellow Submarine" by the Beatles
Z - "Zelda Theme Song" from Zelda