- O
- OO
- OO
- OOak
- OakObe
- ObeObs
- ObsOce
- OceOct
- OctOdd
- OddODE
- ODEODV
- OdyOff
- OffOG
- OGOH
- OHOhm
- OhmOjo
- OjoOki
- Oki
- Old
- OldOle
- OleOli
- OliOlr
- OlsOMA
- OmaOme
- Omeon
- OnONE
- OneONE
- ONEOne
- oneOnl
- OnlOnw
- OnwOpa
- OpaOph
- OphOr
- OrOrb
- OrbOrc
- OrcOre
- OreOri
- OriOrk
- OrkOrp
- OrpOrs
- OrsOs
- OsOsc
- OscOsl
- OsmOsu
- OsuOtn
- OtoOtt
- OttOur
- OurOut
- OutOut
- OutOve
- OveOvi
- OviOwe
- OweOxo
- Oxo
- OZZ
- Original Broadway Cast
- Original Broadway Cast of Girl From the North Country
- Original Broadway Cast of Hamilton
- Original Broadway Cast of The Great Gatsby - A New Musical
- Original Broadway Cast of The Notebook
- Original Cast (this is a real artist. DO NOT USE for musical soundtracks!)
- Original Cast (Original Theatre Cast)
- Original Cast of SpongeBob SquarePants, The New Musical
- Original Cast Recording
- Original Caste, The (folk group)
- Original Charlie Parker Quintet
- Original Concept
- Original Crooks and Nannies, The
- Original de Manzanillo, la
- Original Deutschmacher, Die
- Original Dixieland Jazz Band
- Original Flavor ('90s US rap group)
- Original God
- Original God & LIL NARNIA
- Original Gros Bonnet
- Original Lead Singers of The Temptations, The
- Original London Cast
- Original London Cast of Girl From The north Country
- Original London Cast of Miss Saigon
- Original London Cast of Sister Act
- ORIGINAL LOVE
- Original Mirrors
- Original Motion Picture Soundtrack
- Original Naabtal Duo
- Original Pistols, The
- Original Rap Staff
- Original Rudeboys, The
- Original Sin (UK drum and bass)
- Original Südtiroler Spitzbuam
- Original Swimming Party
- Original Television Cast of Hairspray LIVE!
- Original TV Studio
- Original Uman
- Original Zillertaler (Folk, Pop)
- Original, The (1990s NYC‐based house group)
- Originale, Die
- Originale, Ragz
- Originale, Ragz feat. 24hoursav & Saleh, Dua
- Originale, Ragz feat. Bakar
- Originale, Ragz feat. Glacier, John
- Originale, Ragz feat. LOLA
- Originale, Ragz feat. Sampha
- Originales de San Juan, Los
- Originals, The (Motown group)
- Originals, The (Brazilian group)
- Originoo Gunn Clappaz
- Origo (Epidemic Sound)
- Orihusay
- Orikasa, Fumiko
- Orinegro Tropical (Salsa)
- ORIO (hololive vtuber duo)
- Oriol, Christiane (French singer & songwriter)
- Orioles, The
- Orion (Symphonic Prog Group from France)
- Orion (Cybernetic Noir)
- ORION 224
- Orion 8
- Orion and the Melted Crayons
- Orion Experience, The
- Orion Riders
- orion sun
- Orion the Hunter
- Orion Too (Belgian 2000s trance project)
- Orion Too feat. Caitlin
- Orión XL (Argentine Rapper)
- Orion, DJ (Electro/Cumbia)
- Orion's Reign
- Orion's Reign feat. Minniva
- Orionix
- Orions Belte (Norwegian instrumental band)
- Orions Belte feat. Aase, Sigrid
- Orions Belte feat. Lerche, Sondre
- Orisha
- Orishas (Cuban hip hop group)
- Orishas feat. Buenaventura, Yuri
- Orishas feat. Niko Noki
- Orishas feat. Passi
- Orixa
- Orka
- Orkan (Swedish prog rock)
- Orkest
- Orkest Zonder Naam
- Orkesta Mendoza (Indie Mambo)
- Orkestar Business Class (Finnish band)
- Orkesterpop
