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