Japanese
Ayumi Hamasaki
Namie Amuro
Kumi Koda
Hikaru Utada
AAA
Arashi
Crystal Kay
Ai Otsuka
V6
m-flo
SUITE CHIC (if it counts...)
Anna Tsuchiya
Gyaruru
WaT
Eiji Wentz
Gackt
EXILE
Berryz Koubou (SPECIAL GENERATION is mah jaaaam ~ !!)

English
Rihanna
Christina Aguilera
Madonna
Britney Spears
AFI
Ashlee Simpson
Ciara
Dannii Minogue
Kylie Minogue
Family Force 5
Flyleaf
Marilyn Manson
Operator Please
Gwen Stefani
No Doubt
System of A Down
Hellogoodbye
Gorillaz
Good Charlotte