- 1 oxygen
- 2 Oxford Camerata
- 3 Ozan Koçer
- 4 Om Voices
- 5 oui
- 6 Ovhi Firsty
- 7 Ozodbek Nazarbekov
- 8 ofra haza
- 9 Ocean Blue
- 10 欧阳仙笙
- 11 OTO
- 12 OmO
- 13 oohnoo
- 14 Ogie Alcasid
- 15 OnlyONE
- 16 only
- 17 Ozzy
- 18 Omer Adam
- 19 Orchestra Baobab
- 20 one
- 21 ODUCHU
- 22 呕嗨哟辛啵Cimple
- 23 Once Upon A Time
- 24 Orda
- 25 O
- 26 Orange County
- 27 O-Pavee
- 28 Oag