There is more than one artist with this name:
1) (Japanese) NEEKO (ニーコ, Real Name Nishihagi Isuzu (西萩五十鈴)) is a Japanese Fashion Model and Voice Actress (Seiyuu). She cast in the TV Anime "Katekyo Hitman Reborn! (家庭教師ヒットマン REBORN!)" is Reborn. (Homepage : http://www.neeko21.com/)

2) Philadelphia hip-hop artist

3) Like the cutezst person evaaaarh !
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