There is more than one artist with this name:
1) Nana Kwame Abrokwa, a German rapper.
2) An incorrect tag for Japanese artist Ｎａｎａ
3) An incorrect tag for Japanese movie OST of the same name that should be corrected to NANA starring MIKA NAKASHIMA, REIRA starring YUNA ITO, OLIVIA and 土屋アンナ
4) An alternative alias for Nana Hedin, a Swedish pop artist
5) A Brazillian singer-songwriter
6) A UK Garage artist, from the UK
7) An anime and video game cover artist
8) A German hardcore band
9) A Syrian singer
10) An alternative alias for nana(Sevencolors), a VOCALOID producer on Sevencolors circle.
11) A Thai band (alternative tag: นานา)