| 541. Olivia Walker | Vocals | 1 |
| 541. Olivia Williams | Vocals | 1 |
| 541. Olivier St.Louis | Guitar, Vocals | 1 |
| 541. Ollella | Featured Artist | 1 |
| 541. Olof Arnalds | Featured Artist | 1 |
| 541. Olu Odubiro | Bass | 1 |
| 541. Olya Prohorova (Violin) | Musician | 1 |
| 541. Om'Mas Keith | Percussion | 1 |
| 541. Omah Lay | Vocals | 1 |
| 541. Omar | Featured Artist | 1 |
| 541. Omar "O.C." Credle (emcee) | Musician | 1 |
| 541. Omar Alcaide | Bass, Guitar, Synth | 1 |
| 541. Omar Apollo | Vocals | 1 |
| 541. Omar Grand | Keys, Music Director, Piano | 1 |
| 541. Omar Grant | Bass | 1 |
| 541. Omar Lye-Fook | Keys, Vocals | 1 |
| 541. Omar Martinez-Sandoval | Bass | 1 |
| 541. Omar Montes | Vocals | 1 |
| 541. Omar Phillips | Drums | 1 |
| 541. Omar Sosa | Piano | 1 |
| 541. Omar Sosa & Paolo Fresu | Featured Artist | 1 |
| 541. Omar Sosa & Seckou Keita SUBA Trio | Featured Artist | 1 |
| 541. Omara Portuondo | Featured Artist | 1 |
| 541. Omri Skop | Guitar, Vocals | 1 |
| 541. Onome Edgeworth | Percussion | 1 |