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