| Oren Jenkins |
| Oren Lavie |
| Oren Major |
| Orenda Fink |
| Oreo Blue |
| Oreoereo |
| OreooBeatzzz |
| Oreskaband |
| OREST |
| Oresta Cybriwsky |
| Orestes Vilató |
| Orestis Ntantos |
| Orezi |
| Orfe21 |
| Orfeh |
| Orfeo |
| Orfiz |
| Orford String Quartet |
| Orford String Quartet & Armin Electric Strings |
| Organ |
| Organ & Chimes |
| Organ!k |
| Organ Radio 12 |
| Organ X |
| Organek |
| Organek ONA |
| Organic Audio |
| Orgânico |
| Organisers |
| Organize |
| Organized Konfusion |
| Organized Noize |
| Organoclorados |
| Organs and Chimes |
| Organs & Chimes |
| Orgi |
| Orgi69 |
| Orgone |
| Orgullo Azul y Oro |
| Orgy |
| Orhan Canses |
| Orhan Demir |
| Orhan Ekin |
| Orhan gencebay |
| Orhan Hakalmaz |
| Orhan Helvacıoğlu |
| Orhan Ölmez |
| Orhan Osman |
| Orhan Söğüt |
| Orhan Türkoğlu |
| Orhan Ulaş |
| Orhun Kerem |
| Ori Dagan |
| Oriana |
| Oriana Sabatini |
| Orianthi |
| Oric |
| Oricalkos |
| Orient Pearl |
| ORIENTA |
| Oriental Echo Ensemble |
| Oriente |
| Orietta Berti |
| Origa |
| Origami Amassado & Winston Churchill Rangel |
| Origen |
| Origen Alternativo |
| Origene |
| Origin |
| Originais Do Pagode |
| Original Banda el Limón de Salvador Lizárraga |
| Original Broadway Cast |
| Original Broadway Cast of Beetlejuice |
| Original Broadway Cast Of Evita |
| Original Broadway Cast of Hamilton |
| Original Broadway Cast of Matilda |
| Original Broadway Cast Of Mean Girls |
| Original Broadway Cast of Waitress |
| Original Broadway Casts |
| Original Camellia Jazz Band |
| Original Camellia Jazz Band of New Orleans |
| Original Capitol Orchestra |
| Original Cast Of Annie |
| Original Cast of Billy Elliot |
| Original Cast of Go! Vive A Tu Manera |
| Original Cast of Sandosenang Sapatos |
| Original Cast Recording |
| Original Cast Recording Evita |
| Original Caste |
| Original Casts |
| Original Concept |
| Original Creole Stompers |
| Original Dixieland Five |
| Original Dixieland Jazz Band |
| Original Drifting Cowboys Band |
| Original Elias |
| Original Ensemble vom "Broadway Musical im Hamburger Hafen" |
| Original Fahrende Musikanten |
| Original Flavor |
| Original (German) Cast of "Starlight Express" |
