Thanks, it is Utada Hikaru on her Distance album. She is also known as Utada and Hikki, so you were right for all 3! Nice! I like your avatar too.
I love your avatar :O Is that Utada Hikaru?! :O Utada?! :O Hikki?! :O T_T If I am wrong, I feel stupid... Nice name, though I like the Kaizo in it :O