[KarenPang]

in no particular order :

Bands :

1) ARASHI
2) KAT-TUN
3) NEWS
4) abingdon boys school
5) Tegomass
6) Kobukuro
7) GReeeeN
8) Tackey & Tsubasa
9) KinKi Kids
10) T.M.Revolution (not sure if he's counted as a group or solo act hmm)
11) Hey ! Say ! JUMP

Solo Acts :

1) ayumi hamasaki
2) Ken Hirai
3) Koda Kumi
4) Anna Tsuchiya
5) OLIVIA
6) ayaka
7) YUI
8) Utada Hikaru
9) Namie Amuro
10) otsuka ai
11) Yuna Ito
12) Mika Nakashima

If you would like some recommendations from the list that I came up with , just let me know . I'll be happy to recommend some good stuff