| 554. Otis "Bdoc" Mensah | Bass | 1 |
| 554. Otis Calvin | Musician | 1 |
| 554. Otis Taylor | Featured Artist | 1 |
| 554. Otoboke Beaver | Featured Artist | 1 |
| 554. Otto Marloft | Keys | 1 |
| 554. Ouida | Vocals | 1 |
| 554. Ovasha | Background Vocals | 1 |
| 554. Ovasha Bartley | Vocals | 1 |
| 554. Overcoats | Featured Artist | 1 |
| 554. Owen Clapp | Upright Bass | 1 |
| 554. Owen Clarke | Keyboard | 1 |
| 554. Owen Lange | Mellotron, Purple Cowbell | 1 |
| 554. Owen Pallett | Violin | 1 |
| 554. Ozuna | Vocals | 1 |
| 554. P-Nut | Bass | 1 |
| 554. PJ | Vocals | 1 |
| 554. PJ George | Acoustic Guitar, Keys, Vocals | 1 |
| 554. PJ Harvey | Acoustic Guitar, Vocals | 1 |
| 554. PJ Morton(lead vocals/rhodes) | Musician | 1 |
| 554. PJ Sin Suela | Vocals | 1 |
| 554. PWR BTTM | Featured Artist | 1 |
| 554. Pablo Ilabaca | Guitar, Keys, Music Director, Vocals | 1 |
| 554. Pablo Quintanilla | Strings | 1 |
| 554. Pablo Serrano | Background Vocals, Guitar, Keys, Piano | 1 |
| 554. Pablo Stipicic | Guitar | 1 |