A: Ayumi Hamasaki
B: BoA
C:
D: Do As Infinity
E:
F:
G: Gackt
H:
I:
J: JASMINE
K: Koda Kumi, Kalafina
L: Leah Dizon (eh, i guess)
M: Mika Nakashima
N: Nana starring Mika Nakashima
O: Otsuka Ai
P: Perfume (kinda)
Q:
R: Robots in Disguise, Reira starring Yuna Ito
S:
T: Tohoshinki (i guess)
U: Utada Hikaru, Ueto Aya
V:
W:
X:
Y: Yuna Ito
Z:
1,2,3:
other: 浜崎 あゆみ
yes, i need to find more singers, lol