- 1 ObulKasim-Omar
- 2 oxygen
- 3 Otro Nivel
- 4 Oxford Camerata
- 5 Ozan Koçer
- 6 Ombre2Choc Nation
- 7 OneMusic Record
- 8 Olbaid
- 9 Om Voices
- 10 OSAD
- 11 Orange Blue
- 12 Olya Polyakova
- 13 Onetwo咪
- 14 OnlyONE
- 15 Oliver Mtukudzi
- 16 Ori Kaplan
- 17 Out Of Order
- 18 Ovhi Firsty
- 19 Osho
- 20 Ozodbek Nazarbekov
- 21 Ocean Blue
- 22 Omar Khairat
- 23 oui
- 24 Oh Yeonju (153/Joombas)
- 25 OTO
- 26 Orezi
- 27 Ogie Alcasid
- 28 Oddkidout
- 29 OZMO
- 30 Omer Adam