| Oasis | 42 |
| Obispo Pascal | 1 |
| Obispo Pascal , Faudel, Winter Ophelie, Fabian Lara, Zazie, Red Axelle | 2 |
| Obreadnie | 4 |
| Oceana | 2 |
| Ocean Billy | 11 |
| Ocean Colour Scene | 2 |
| Ocean Jet | 1 |
| Oceanlab feat. Justine Suissa | 3 |
| Ochisanu Adriana | 51 |
| Ochisanu Adriana и Paladi Ion | 1 |
| Octavian | 2 |
| Odeon | 2 |
| Odyssey | 1 |
| Ofenbach | 3 |
| Offenbach (Оффенбах) Jacques | 7 |
| Offside (Комитет) | 1 |
| Offspring | 22 |
| Of Mice And Men | 1 |
| Of Monsters and Men | 3 |
| Of Monsters anf Men | 1 |
| OG3NE | 1 |
| Oğuz Aksaç | 1 |
| Ohio Players | 1 |
| Oh Land | 1 |
| Oh Wonder | 1 |
| O'Jays | 7 |
| Ok Go | 4 |
| Oksana | 1 |
| Oksana Fluff | 1 |
| Oksi | 1 |
| OKSIOMA | 2 |
| Oktoberfest | 2 |
| Okudo Tomohisa | 1 |
| Ola | 3 |
| Olaru Natalia | 33 |
| Olesea Covalenco | 1 |
| OLISHA | 10 |
| OLISHA & Саня | 1 |
| Olive | 1 |
| Oliver | 1 |
| Olivia Broadfield | 1 |
| Olivia Lufkin | 1 |
| Olly Murs | 13 |
| Olly Murs и Flo Rida | 1 |
| Olly Murs и Rizzle Kicks | 1 |
| Olmez Orhan | 2 |
| Olstead Renee | 12 |
| Olta Boka | 1 |
| Omar Kent Dykes | 1 |
| Omar Naber | 1 |
| Omega | 13 |
| Omer Adam | 1 |
| OMI | 1 |
| Omidia | 7 |
| Omnia feat. Tilde | 1 |
| Omnimar | 5 |
| Omnium Gatherum | 2 |
| Omny Style | 1 |
| Onashvili Mamuka | 2 |
| O'Neal Jamie | 9 |
| One Desire | 2 |
| One Direction | 71 |
| One Less Reason | 1 |
| One More Time | 1 |
| One OK Rock | 2 |
| OneRepublic | 20 |
| OneRepublic и Timbaland | 1 |
| One-T And Cool-T | 1 |
| Onetwo | 2 |
| On I Ona | 2 |
| On/Off | 1 |
| Onofrei Diana | 16 |
| Ono Lisa | 11 |
| ON ROBOT | 2 |
| Oomph! | 33 |
| Oonagh | 3 |
| Open Kids | 16 |
| Open Kids ft. DETKI | 1 |
| Opeth | 18 |
| Opium Project | 9 |
| Opus | 1 |
| OR3O | 3 |
| Orange House | 1 |
| Orchester Raivo Tammik | 3 |
| Orchestra Bagutti | 6 |
| Orchestra Bagutti и Patrizia | 1 |
| Orchestra Casadei | 2 |
| Orchestra Castellina-Pasi | 1 |
| Orchestra Di Roma | 1 |
| Orchestra Matteo Tarantino | 3 |
| Orchestra Nicolette & Franco | 1 |
| Orden Ogan | 1 |
| Orera | 1 |
| Orhan hakalmaz | 1 |
| Orianthi | 1 |
| Orietta Berti | 1 |
| Origa | 1 |
| Original DJ & Band | 1 |
| Orion Jimmy Ellis | 1 |
| Orrico Stacie | 3 |
| Ortac Serdar | 19 |
| Ortac Serdar и Seker Ahmet | 1 |
| Ortega Palito | 10 |
| Osbourne Kelly | 3 |
| Oscar And The Wolf | 3 |
| Oskar Lopez | 1 |
| Oskar Rieding (Ридинг) | 1 |
| Osman Navruzov | 1 |
| OstAnya | 2 |
| Ost+Front | 33 |
| OST Hairspray | 1 |
| OST La La Land | 2 |
| Ostrov Sokrovishch (OST) | 2 |
| OST Skyrim | 1 |
| OST TMNT | 2 |
| OST Toy Story | 2 |
| OST Дерзкие дни Ольга Весенина | 1 |
| OST Пираты Карибского моря | 1 |
| O'Sullivan Gilbert | 10 |
| Osvaldo Farres | 1 |
| Otari (Отари) Ramishvili (Рамишвили) | 1 |
| Otis Blackwell | 1 |
| Otis Rush | 1 |
| Oto Nemsadze | 1 |
| O.Torvald | 4 |
| O'trava (Отрава) | 1 |
| Ottaiano Antonio | 2 |
| Ottawan | 6 |
| Ott Lepland | 1 |
| Otto Dix | 37 |
| Otto Staniloi | 1 |
| Ot Vinta (От винта) | 1 |
| Ounce Of Self | 1 |
| Our Last Night | 4 |
| Our Waking Hour | 2 |
| Outasight | 1 |
| OutKast | 2 |
| Outlandish | 2 |
| OV7 | 4 |
| Overtones | 3 |
| Ovidijus Vysniauskas (Vyšniauskas) | 1 |
| Ovidiu Anton | 2 |
| Owen Campbell | 1 |
| Owl City | 15 |
| Owl City ft. Carly Rae Jepsen | 1 |
| Owl Eyes | 1 |
| Oxa Anna | 17 |
| Oxa Anna и Chayanne | 1 |
| Oxa Anna и Leali Fausto | 1 |
| Oxo | 1 |
| Oxxxymiron | 54 |
| Oxxxymiron feat. Porchy | 1 |
| Oxxxymiron feat Ка-тет | 1 |
| Oxxxymiron feat. Луперкаль | 1 |
| Oxxxymiron feat. Самариддин Раджабов | 1 |
| Oxxxymiron ft. СД | 1 |
| Oybek & Nigora | 1 |
| Oybek va Nigora | 1 |
| Ozen Gokhan | 6 |
| OzielZinho | 3 |
| O-Zone | 12 |
| Ozzy Osbourne | 48 |