| Old Man Saxon |
| Old Metropolitan Band |
| Old Mother Hell |
| Old News |
| Old Notes |
| Old Relation |
| Old School Freight Train |
| Old School Junkies 2 |
| Old School Players |
| Old Skool Disco Masters |
| Old South Brass Band |
| Old State |
| OLD STORY PROJECT |
| Old Sweat |
| Old Tjikko |
| Old Town Mafia |
| Old World Disorder |
| OLDCODEX |
| Oldelaf |
| Oldfield Mike |
| Oldie Börse |
| OldPee |
| Ole |
| Ole "Fessor" Lindgreen |
| Ole Hansen |
| Ole Hartz |
| Ole Kirkeng |
| Ole Kock Hansen |
| Olé Olé |
| Ole-ole the world kita juara |
| Ole Paus |
| Ole Stolle |
| Oleander |
| OLEG |
| Oleg Frish |
| Oleg Lundstrem |
| Oleg Lundstrem Orchestra |
| Oléin |
| Olej & Stereoteric |
| OLEK |
| Olek Klepacz |
| Olek Sikora |
| OleM |
| Olen Music |
| Olene Kadar |
| Olesya Rulin |
| Oleta Adams |
| Oletha Carter |
| Olevante |
| Olexesh |
| OLEYNIK |
| Olga |
| Olga Bonczyk |
| Olga Guillot |
| Olga Konkova |
| Olga Lounová |
| Olga Merediz |
| Olga Neculai |
| Olga San Juan |
| Olga Scheps |
| Olga Tañón |
| OlgaTakis |
| Olgun Simsek |
| Oli |
| Oli Fox |
| Oli G. |
| Oli Moss |
| Oli P. |
| Oli Silk |
| Oli Swan |
| Olia Tira |
| Olimpik |
| Olimpo Cardenas |
| Olin and the Moon |
| Olin Johnson |
| Olin & the Moon |
| OliO |
| Oliszja |
| OLIVA GUJO |
| Olivae |
| Olive |
| Olive et Moi |
| OLIVE & MOI |
| OliveGreen |
| Oliver |
| Oliver $ |
| Oliver |
| Oliver! 2009 London Cast |
| Oliver A. Branch, III |
| Oliver and Company |
| Oliver Baxxter |
| Oliver Cast Ensemble |
| Oliver Cheatham |
| Oliver Chesler |
| Oliver Darley |
| Oliver Davis |
| Oliver/Dawson Saxon |
| Oliver Dragojevic |
| Oliver Eng |
| Oliver Frank |
