I'm not really a fan of Ai Otsuka (no offense, I just don't listen too that many of her songs...by not really a fan, I mean, I'm not incredibly familiar with her). Funny thing is that I didn't even look at her name and I knew it was her! XD She has a very unique voice.

Ai Otsuka- Is:

Enjoy! I don't have much to say...XD