| Irina Otieva | SoundtrackPopPop genreJazz | 5 |
| Natalia Oreiro | SoundtrackPop | 3 |
| Ottokar Novacek | Classic | 1 |
| Oleg Anofriyev | SoundtrackSoviet songPop genrePop | 13 |
| Otnicka | Dance music | 1 |
| Olivia Jones | Pop | 1 |
| Olaf Berger | Pop genre | 1 |
| Olga Getalova | Classic | 1 |
| Oleg Mityaev | Bard musicPopPop genre | 5 |
| Olivia Lunny | Pop | 1 |
| Roy Orbison | PopPop RockSoundtrackPop genreBallad | 4 |
| City of Prague Philharmonic Orchestra | Soundtrack | 1 |
