| Bishops' Choir of the Nizhny Novgorod Diocese | Church music | 1 |
| Olga Voronets | Soviet songPop genre | 3 |
| Mahmut Orhan | Dance musicPop | 3 |
| ONF | Pop | 1 |
| Oh Wonder | Independent music | 1 |
| Owen Westlake | Electronic music | 1 |
| Fyr Og Flamme | Pop | 1 |
| Johnny Orlando | Pop | 1 |
| Olsen Brothers | Pop | 1 |
| Elena Obraztsova | Romance | 1 |
| Olaf & Hans | Pop | 2 |
| Olga Zarubina | Pop genrePopSoundtrack | 21 |
