| Zerrin Özer | Ethnische Musik | 1 |
| OR3O | Soundtrack | 1 |
| Only The Family | Rap/ Hip-Hop | 1 |
| Oaks | TanzmusikPopElektronische Musik | 1 |
| B.G. The Prince Of Rap | EurodanceTanzmusik | 2 |
| New Kids On the Block | Pop | 2 |
| Olly Alexander | PopEurodanceTanzmusikSynthiepop | 1 |
| Alessandro Olivato | Pop | 1 |
| Olivia Addams | Pop | 1 |
| Oksana Pochepa (Akula) | PopTanzmusik | 2 |
| Ozoda | Pop | 1 |
| Kings of Günter | Pop Estrada | 1 |
