AFI,
Hamasaki Ayumi,
Fin.KL,
Hyolee,
BoA*,
Drunken Tiger,
BabyVOX,
Hikaru Utada,
Camui Gackt,
Aucifer,
Suitei Shojo,
Wheesung,
Kang Ta,
Lee Soo Young,
Kumi Kouda,
Fly to the Sky,
Se7en,
Eun Ji Won,
GOD,
S.E.S.,
Ahn Jae Wook,
Bi,
SM Town,
Eugene,
Dejavu,
The Pillows,
Shinwa,
Dir en Grey,
L'Arc-en-Ciel
Jang Nara,
Jini unnie~
KISS,
H2Ohh!
WAX

That's the current list. I'm making this thread a sticky, this will be the official thread for this from now on, to avoid duplicates.