| Trans-Siberian Orchestra | KlassikPop | 3 |
| Oscar Benton | Blues / Bluesrock | 1 |
| Obe Dve | Indi-Musik | 1 |
| Oleg Smith | Rap/ Hip-Hop | 1 |
| Onerah | Rap/ Hip-Hop | 1 |
| Fall Out Boy | Rap/ Hip-HopPopRockPop Rock | 5 |
| Oliver Heldens | TanzmusikPopElektronische Musik | 4 |
| Oleg Miami | Pop | 13 |
| OFFMi | Rap/ Hip-Hop | 1 |
| Onlife | Rap/ Hip-Hop | 1 |
| The Offspring | Alternative Musik / Alternative RockRock | 5 |
| System of a down | Rock | 3 |
