| Janet Orenstein | Soundtrack | 1 |
| Oscar | Pop | 1 |
| The Cast of Wonka | SoundtrackPop | 3 |
| Only Murders in the Building – Cast | Soundtrack | 1 |
| Mägo De Oz | PopPop RockFolk | 1 |
| OG Bulldog (Vo. Kazuma Kudo) | Soundtrack | 1 |
| Oksana Kovalevskaya | Pop | 1 |
| Dolores O'Riordan | PopBard music | 1 |
| Oksana Razumovskaya | Pop | 1 |
| Valve Studio Orchestra | Instrumental musicPopElectronic musicSoundtrack | 2 |
| Olivia Olson | SoundtrackPop | 1 |
| Evgeny Okunev | PopDance music | 1 |
