| OOKI Risa as Sailor Uranus |
| Ookiku Furikabutte |
| Ookla the Mok |
| Ookubo Rumi |
| Oolacile |
| Oomkah Dee |
| Oomori Seiko |
| Oomph |
| Oomph feat. Nina Hagen |
| Oonagh |
| Oonagh mit Santiano |
| Oonishi Saori |
| OOOD |
| oOoOO |
| Oooops |
| Oops |
| Oosugi Kumiko |
| ooTall Like Tyrion |
| Ootori Choutarou |
| Ootori Eichi x Ittoki Otoya |
| Ootsuki Kenji |
| Ootsuki Kenji to Zetsubou Shoujotachi |
| Ootsutsuki Kaguya |
| Oozing Wound |
| OP |
| OP 1 |
| OP 2 |
| OP 21 |
| OP 3 |
| OP 4 |
| OP Boom Boom Satellites |
| OP Re Hamatora Full Vietsub |
| OP Togainu no Chi |
| OP Дети Индиго из другого мира |
| OP2 |
| Opalo |
| Opca Opasnost |
| Opel Zafira, Андрей |
| Open Air |
| Open Angels |
| Open Chapter |
| OPEN COFFINS |
| Open For Fun |
| OPEN GE |
| Open Hand |
| Open Kids |
| Open Kids ft. NEBO5 |
| Open Minded |
| Open Space |
| OPEN STAR |
| Open The Skies |
| Open Up 32 |
| Open.az |
| OpenBSD |
| OpenBSD Team |
| Opener |
| Opening |
| Opening 1 |
| Opening 14 |
| Opening 18 |
| Opening 2 |
| Opening 2 AAA |
| Opening 20 |
| Opening 31 |
| Opening 34 |
| Opening 37 |
| Opening 39 |
| Opening 4 |
| Opening 46 |
| Opening 5 |
| Opening Naruto |
| Opening one |
| OPENKO |
| Openspace Garage |
| Oper Frankfurt 2013 |
| Opera |
| OperA feat. Adduction |
| Opera IX |
| Opera Magna |
| Opera Skaala |
| OperaNoire |
| Operatic |
| Operatika |
| Operation Ivy |
| Operator Please |
| Operina |
| Opernhaus Zurich, May 2009 |
| Opeth |
| Opex |
| Ophelia Denisova |
| Opher Yisrael |
| Ophidian |
| Ophidian And Ruffneck |
| Ophidian feat. William F. DeVault |
| Ophis |
| Opi laskemaan suomeksi |
| Opick |
| Opii |
| OpiUm |
| Opium Doll |
