A: Ai Otsuka, Ayumi Hamasaki ♥
B: Britney Spears
C: Christina Aguilera, Chae Yeon
D: DOUBLE
E: ERIKA
F: -
G: -
H: -
I: Ivy
J: Jolin Tsai ♥
K: Kumi Koda ♥
L: Lee Hyori, Lee Jung Hyun, Lady GaGa ♥
M: Maki Goto, Morning Musume ♥
N: Namie Amuro ♥♥♥
O: -
P: Pussycat Dolls
Q: -
R: -
S: Seo In Young ♥
T: -
U: Uhm Jung Hwa, U;nee ♥
W: Wonder Girls
X: -
Y: Yuna Ito
Z: -

A: ayaka
B: BoA / Belle Epoque
C: Clazziquai Project
D: Donawhale
E: Epitone Project
F: Fanny Fink
G: Girls' Generation
H: Humming Urban Stereo
I: Instant Romantic Floor
J: Jelly Boy
K: KARA
L: Lucite Tokki
M: Misty Blue
N: Namie Amuro
O: OldFish
P: Peppertones
Q: -------------
R: REMIOROMEN
S: school food punishment / Shoko Nakagawa
T: The Melody / Taru
U: Uhm Jung Hwa
V: Vanilla Acoustic
W: Wonder Girls
X: -------------------
Y: Youhna / Yozoh
Z: Zitten
1,2,3: 2AM

lets see if I can do this... I don't think this is everyone but w/e. and I only did japanese artists. and some kpop too.

A: ayumi hamasaki, anna tsuchiya, ami suzuki, Again
B: BoA, Bi Rain, Big Bang, Bis
C: capsule, Crystal Kay, Clazziquai Project
D: DBSK
E: Eri Nobuchika
F:
G: Gackt, GazettE
H: HYDE
I:
J:
K: Koda Kumi
L: L'Arc~en~Ciel, Leah Dizon
M: Monkey Majik, m-flo
N: Namie Amuro,
O:
P: Perfume,
Q:
R:
S: Super Junior, Shinichi Osawa
T:
U: UVERworld, Utada Hikaru, Uhm Jung Hwa
V:
W:
X:
Y: Yasutaka Nakata, YUI, Yuna Ito, Yoji Biomehanika
Z: Zwei

A: Ayumi Hamasaki, abingdon boys school, Aqua Timez, ASIAN KUNG-FU GENERATION
B: BoA, BUCK-TICK, BONNIE PINK
C: chatmonchy
D: Do As Infinity, Dazzle Vision
E: Evanescence, Eri Nobuchika
F:
G: girugamesh, the GazettE
H: HIGH and MIGHTY COLOR, Hitomi Shimatani, HY
I: Ikimono Gakari, immi
J:
K: Kana Nishino, Kelly Clarkson
L: Lady GaGa, Leah Dizon, LiN CLOVER
M: MEG, MUCC, Michelle Branch, melody.
N: Namie Amuro, Nichika, Nickelback, Nirvana
O: OLIVIA, ORANGE RANGE
P: Perfume, P!nk, Pizzicato Five
Q:
R: Rihanna, Rie fu
S: Spangle call Lili line, school food punishment, Slipknot
T: TOHOSHINKI
U: UVERworld, Utada Hikaru
V: Vanessa Carlton
W: Who the *****
X:
Y: Yu Yamada, YUI
Z:
#: 9mm Parabellum Bullet

A: Ayumi Hamasaki / alan / Arcade Fire
B: Bonnie Pink / Beck / Bright Eyes
C: Chihiro Onitsuka
D: David Bowie / Do As Infinity
E: -
F: fra-foa
G: GO!GO!7188
H: Hikaru Utada
I: Ice Creamusume
J: Judy & Mary
K: -
L: Lee Jung Hyun / Lee Soo Young
M: Morning Musume / My Chemical Romance / Michelle Branch
N: Namie Amuro / Norah Jones
O: -
P: Perfume / Prince / Plus-Tech Squeeze Box
Q: Queen
R: RJD2
S: -
T: Tokyo Jihen
U: -
V: -
W: -
X: -
Y: YUKI, YUI
Z: -
1,2,3: -
other: -

A: Alanis Morissette, Avril Lavigne, Aya Kamiki, ayumi hamasaki
B: B'z
C: Christina Aguilera
D: Diego Torres
E: Every Little Thing
F: -
G: GARNET CROW, GLAY
H: Hironobu Kageyama
I: Ishihara Yuujirou
J: Juanes, JUDY & MARY
K: Koshi Inaba
L: L'Arc~en~Ciel, Laura Pausini, Lynda
M: Mai Kuraki
N: Namie Amuro
O: -
P: -
Q: -
R: Rina Aiuchi
S: Sayuri Iwata, Shiori Takei
T: Tak Matsumoto
U: U-ka saegusa IN db
V: -
W: -
X: X Japan
Y: Yashiro Aki
Z: ZARD

A: ayumi hamasaki, Angela Aki, Amy Macdonald
B: BONNIE PINK, Björk
C: capsule, Crystal Kay, Clazziquai Project
D: Do As Infinity, Dido, Duffy
E: Enigma, Eri Nobuchika, Eels
F: Fantastic Plastic Machine
G: Günther
H: HINOI Team, Hans Zimmer
I: Interpol
J: Jens Lekman
K: Keane, The Knife, KINYA
L: Lily Allen
M: Maaya Sakamoto, Matchbox 20
N: Nada Surf, Nickel Creek
O: Orange Range
P: Pizzicato Five
Q:
R: RURUTIA, Ryuichi Sakamoto
S: Sia
T: Tomiko Van, Tommy february6
U: Utada Hikaru
V: Vanessa-Mae
W:
X:
Y: Yellow Magic Orchestra
Z:
1,2,3:
other:

A: Ayumi Hamasaki/alan/Anna Tsuchiya
B: Berryz Koubou/Big Bang/BoA
C: C-ute/Christina Aguilera
D:
E: Evanescence/EXILE
F: F.T Island
G: Girls Aloud/Gorillaz/Gwen Stefani
H: Hitomi Shimatani
I:
J: JoJo/Jolin Tsai
K: Koda Kumi/Kelly Clarkson/Kanon Wakeshima
L:
M: Morning Musume/Mariah Carey
N: No Doubt/Nana Kitade/Namie Amuro
O: OLIVIA
P: Perfume
Q:
R: Rhianna/Rie Fu
S: Shoko Nakagawa/Spice Girls
T: t.A.T.u/Tommy Heavenly6
U:
V: The Veronicas
W:
X:
Y: YUI
Z:
1, 2, 3: 2NE1/4Minute
other:

A: Ayumi Hamasaki
B: BoA
C: Celina Ree
D: dj havana brown (I've only seen her live, can't find her music. Damn!)
E: Evanescence
F: ---
G: Gackt
H: Hitomi Shimatani
I: Infernal
J: Jesse McCartney
K: Kana (MOON Kana)
L: Linda Andrews
M: Michael Jackson
N: Nightwish
O: OLIVIA
P: ---
Q: ---
R: ---
S: Shakira
T: t.A.t.U
U: ---
V: ---
W: ---
X: ---
Y: ---
Z: ---
1,2,3: ---
Other: ---

A-Ayumi Hamasaki,
B-BoA, Bi, BigBang,
C-
D-Dafi(local artist),DBSK
E-
F-Farah Fauzana(local artist)
G-
H-Hamasaki Ayumi :D
I-
J-
K-Keira Knightly
L-
M-
N-
O-
P-
Q-
R-
S-SITI NURHALIZA (local artist)
T-Tohoshinki,TVXQ
U-Utada Hikaru
V-
W-Wonder Girls
X-
Y-
Z-

1-
2-2NE1, 2PM
3-

The bold font is the most I love

A : Ayaka, Alan
B : Britney Spears, Bond
C : -
D : Do as infinity
E : Erika sawajiri
F : -
G : -
H : Hamasaki Ayumi, Hitomi
I : -
J : jessica Mauboy,
K : Kelly Clarkson, kylie Minogue
L : Lady Gaga
M : Madonna, Mariah carey
N : Namie Amuro
O : -
P : Paul Oakenfeld
Q :
R : Rihanna
S : SPEED, Suzuki Ami, Stephanie
T : t.A.T.u
U : -
V : -
W : -
X : -
Y : Yuna ito
Z : -

A : ayaka, alan, Ayumi Hamasaki, AAA, Ai Otsuka, Ashlee Simpson, Ami Suzuki, Aira Mitsuki, Avril Lavinge, Aya Kamiki, anna Tsuchiya
B : Britney Spears, BoA, BONNIE PINK, Brown Eyed Girls, Big Bang, B'z, Beyonce, Black eyed Peas
C : Cobra Starship, capsule, Christina Aguilera
D : Do as infinity, dido
E : Eminem
F : 4Minute, fergie, Fräulein wunder
G : Go!Go!7188, Gackt, GIRL NEXT DOOR, Girls Generation, G-Dragon, Gwen Stefani, Genki Rockets
H : Hitomi, hyori Lee
I : -
J : Jolin Tsai, juli
K : Koda Kumi, Kylie Minogue, Katy Perry, kate Nash
L : Lady Gaga, Leah Dizon, Lily Allen
M : m-flo, MEG, melody., misono, mihimaru GT, MAKI GOTO, MiChi, my little airport, MIA., Mika Nakashima, Miley Cyrus, Madonna
N : Namie Amuro, Nana Kitade, Nami Tamaki, Nelly Furtado, No Doubt
O : ORANGE RANGE
P : Perfume, P!nk, Paramore, PUFFY, pussycat dolls, PENGIN, Panic at the Disco
Q : Queensberry
R : ravex, Rihanna
S : SUITE CHIC, shoko Nakagawa, Silbermond, Shion Miyawaki, Sera Ko-Jo, school food punishment, sakanaction, SOULHEAD, SCANDAL
T : the Ting Tings, Testsieger, türspion, 2NE1, the Beatles
U : Utada Hikaru
V : VERBAL
W : Wir Sind Helden
X : -
Y : YUI
Z : ZEEBRA


and many many more

thread updated! :lech

A. Ayumi Hamasaki
B. Beyonce / Black Eyed Peas
C. Christina Aguilera
D. Damien Rice / Destiny's Child
E. Eminem
F. Fergie
G. Guus Meeuwis
H. ----
I. ----
J. James Blunt
K. Katie Melua
L. Leona Lewis / Lady Gaga
M. Maria Mena
N. Namie Amuro
P. Plushgun
Q ---
R. Rihanna
S. Stan Walker / Snow Patrol
T. Tori Amos
U. Usher
V. ---
W. Within Temptation
X. ---
Y. ----
Z. ----

I'm gonna try and update this from the last time I did it.

A: ayumi hamasaki, anna tsuchiya, ami suzuki, Again, aural vampire
B: BoA, Bi Rain, Big Bang,
C: capsule, Crystal Kay, Clazziquai Project
D: DBSK, Do As Infinity
E: Eri Nobuchika
F:
G: Gackt, GazettE, Geist
H: HYDE
I: Iconiq
J: Jasmine
K: Koda Kumi, Kanon Wakeshima
L: L'Arc~en~Ciel, Leah Dizon
M: Monkey Majik, m-flo, Meisa Kuroki, MiChi
N: Namie Amuro,
O: Outsider
P: Perfume, 2PM
Q:
R:
S: SHINee, Shinichi Osawa, Se7en
T: Tommy Heavenly6
U: UVERworld, U-Kiss, Utada Hikaru, Uhm Jung Hwa
V: Vamps
W:
X:
Y: Yasutaka Nakata, YUI, Yuna Ito, Yoji Biomehanika
Z: Zwei

A - Ayumi Hamasaki, alan
B -
C - Chisu
D - Do As Infinity
E - Eiko Shimamiya
F - fripSide
G - globe, GIRL NEXT DOOR
H -
I - Irina
J - Jenni Vartiainen
K - KOTOKO, Kaori Utatsuki
L - Lady GaGa, Lia
M - Mami Kawada, MELL, Maija Vilkkumaa
N -
O -
P - PMMP
Q -
R - Roxette
S - Stella, Saori@destiny
T - t.A.T.u
U - Utada Hikaru
V -
W -
X -
Y -
Z -

A: Ayumi Hamasaki, Ai Otsuka, Aiko Kitahara, aiko, alan, Adam Lambert, Aya Kamiki
B: B'z (ALWAYS), Britney Spears
C: Crystal Kay
D: Do as Infinity
E
F
G: Girls Generation, GACKT, GIRL NEXT DOOR
H: Hikaru Utada, Hyori Lee
I
J
K: Koda Kumi, Koshi Inaba, Kobukuro, KARA
L: Leah Dizon (my gulity pleasure <3), Lady GaGa
M
N
O
P: Porno Graffitti
Q
R
S
T: t.A.T.u
U
V
W
X
Y: YUI
Z

(When I can think of anymore, I'll fill it! :D)

up date time

A: Ayumi Hamasaki, ARASHI, alan
B: BeforU
C: Cascada
D: D.H.T.
E: Eiko Shimamiya
F:
G: Girls' Generation
H: Hikaru Utada
I: ICONIQ
J: JASMINE
K: KOTOKO, KAT-TUN, Kana Nishinio, Kumi Koda
L: LIA, LIGHTS
M: MELL
N: Nana Mizuki, Namie Amuro, NEWS, Nami Tamaki
O: OLIVIA
P: Perfume
Q:
R: Riyu Kosaka
S:
T: t.A.T.u., THYME, Tegomass
U:
V: (The) Veronicas
W:
X:
Y: Younha, YUI,
Z:

A: Alice in Videoland / Alien Ant Farm
B: B'z / BIG BANG / blink182 / Bloodhound Gang / David Bowie
C: Chase & Status / Crystal Castles / Coheed & Cambria / Czesław Śpiewa
D: Daft Punk
E: ELLEGARDEN
F: Fall out boy
G: G-Dragon / Genesis / Garbage
H: Hamasaki Ayumi / HIGH SPEED BOYZ
I:
J: Joan Jett
K: The Killers / Koda Kumi
L: Lady GaGa / Adam Lambert / The Lonely Island / Linkin Park
M: Maximum The Hormone / Marina & The Diamonds / Muse / Mumford & Sons / The Midnight Beast / Motorhead / MSI / MUCC
N:
O: Oomph! / ONE OK ROCK
P: Plan B / Katy Perry / P!nk / Pendulum / Panic! At the disco / The Prodigy / The Pretty Reckless
Q: QUEEN
R:
S: The Smashing Pumpkins / The Subways / The Streets / SID
T: Tenacious D / Tsuchiya Anna
U:
W: Weezer
V: Vampire Weekend
Y:
Z:
#: 3OH!3 / 30 seconds to Mars / 2NE1 / +44