Whoa, this is hard.. I luv Ayu very much, and I like Kuu, Namie, Utada, and BoA,, but you said you didn't like it (why you don't like Kuu?? she's cool), so..
how about Ai Otsuka if you want some pop? or Ami Suzuki if you wanna try some disco?
I listen to Kpop, but most of them are soundtracks from my favorite dramas, like Coffee Prince (the songs are quiet nice), and Princess Hours..
