For me.
BEST ~
Sakura Drops - Utada Hikaru
Yuna Ito - Precious
Boa - Everlasting
CAROLS - Ayumi Hamasaki
Bye My Melody - Ken Hirai
I like others like:
mink - Innocent Blue ~Chi Hate Umi Tsukiru Made~
REIRA starring YUNA ITO - Truth
RYTHEM - Sakura Uta
Otsuka Ai - Planetarium
GLAY - Kodou
Koda Kumi - Koi no Tsubomi
WORST~
misono - LOVELY CAT'S EYE
Utada - You Make Me Want To Be A Man
Rinka - XXX(Millions Kisses)
Otsuka Ai - Frienger
Ito Yuna - losin'
Goto Maki - SOME BOYS! TOUCH
Hamasaki Ayumi - appears
Koda Kumi - COLOR OF SOUL
Koda Kumi - COME WITH ME
Koda Kumi - m.a.z.e
Koda Kumi - So Into You
Koyanagi Yuki - Chikai
Hamasaki Ayumi - (miss)understood