| O Testemunho |
| O Thorn |
| O-Tones |
| O'Tool, Timmy |
| O Tortuga |
| O.Torvald |
| O. Torvald |
| O.torvlad |
| O-town |
| O'Town Boyz |
| O$treet |
| O Último Dia na Eternidade |
| O.V.E |
| O.V. Wright |
| O. Valentin Rangel |
| O Vento Solar |
| O.W.L.S. |
| O Wave |
| O-Wavy |
| O&x |
| O X R |
| O.x.riico |
| O.X.Y.Z. |
| O'Yaba |
| O' Yaba |
| O.Z the HitMaker |
| O$ Zae |
| O Zone |
| O-Zone |
| O-Zone NetLabel |
| O1 |
| O1 Ver |
| O1g |
| O2 |
| O2 Boyz |
| O2 Duo |
| O2 EP |
| O2 Tbb |
| O2dr |
| O2future |
| O2Jordan |
| O2K |
| O2Meraki, Cartier |
| O2NotNice |
| O2ran |
| O3 |
| O3Ni |
| O6boys |
| O6i |
| O9thegr8 |
| OA |
| OA Duo |
| Oa$is |
| OA KZ |
| Oa Oasis |
| Oacoma |
| OAD |
| Oaf1 |
| OAFF |
| OAG |
| OAK |
| OAK & Friends |
| Oak Glen |
| Oak$hawn |
| Oak$hawn & TaiBanz |
| Oak Mountain |
| Oak Palace |
| Oak Ridge Quartet |
| Oak Top |
| Oakahtoakseh |
| Oakane Ace |
| Oakë |
| Oaken Flow |
| OAKENPOLE |
| Oaker |
| Oakes |
| Oakey |
| Oakey Philip & Moroder Giorgio |
| Oakheart |
| Oakhill |
| Oakie Doke |
| Oakie, Jack |
| Oakland Soul Entertainment Presents |
| Oakley Black |
| Oakley Dalton |
| Oaklnd |
| Oakloar |
| Oakpark |
| Oaks & Bans |
| Oaks Bentley |
| Oakstreet |
| Oaktown Jazz Workshop |
| Oaktownsoul |
| Oaktree |
| Oaku |
| Oakvale |
| Oakville |
| Oakwood Grove |
| Oakwood University USM Alumni |
| Oaky |
