- O
- OO
- OO
- OOak
- OakObi
- ObiObt
- ObtOce
- OceOct
- OctOdd
- OddODO
- ODOOf
- OfOfn
- OfoOh
- OhOhm
- OhmOK
- OKOKO
- OkoOla
- OlaOld
- OldOli
- OliOll
- OllOly
- OlyOme
- OmeOmp
- OMROne
- OneONE
- OneOne
- OneOnl
- OnlOoj
- OokOpe
- OpeOpp
- OPROra
- OraOrc
- OrcOre
- OreOri
- OriOri
- OriOrp
- OrpOrt
- OrtOsa
- OsaOsh
- oshOss
- OssOth
- OthOtt
- OttOur
- ourOut
- OutOut
- OutOve
- OveOvi
- OviOwl
- OwlOy
- OyaOzu
- OzuOZZ
- Orient Fall (modern progmetal band)
- Orient Pearl
- Oriental Sunshine
- Orientalis, Oceanvs
- Orientalis, Oceanvs & Mese, Idil
- Oriente (Rap group)
- Orig. Alpenland Quintett
- ORIGA (Russian singer active in Japan)
- Origami Angel
- Origami Tsunami (Alternative band from Manchester)
- Origami, Button
- Origamibiro
- Origene
- Origin (Kansas metal band)
- Origin Unknown (UK Drum & Bass producers Andy C & Ant Miles)
- Origin, The
- Originais do Samba, Os
- Original 3
- Original 7ven, The (formerly 'The Time')
- Original Alpenland Quintett
- Original Arzgebirgsche Randfichten
- Original Broadway Cast
- Original Broadway Cast
- Original Broadway Cast
- Original Broadway Cast of Girl From the North Country
- Original Broadway Cast of Hamilton
- Original Cast (this is a real artist. DO NOT USE for musical soundtracks!)
- Original Cast (Original Theatre Cast)
- Original Cast Recording
- Original Caste, The (folk group)
- Original Charlie Parker Quintet
- Original Concept
- 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 Sister Act
- ORIGINAL LOVE
- Original Mirrors
- Original Motion Picture Soundtrack
- Original Naabtal Duo
- Original Pistols, The
- 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 (electronic/house group)
- Originale, Die
- Originale, Ragz
- Originale, Ragz feat. Glacier, John
- 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 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
- Orionix
- Orions Belte (Norwegian instrumental band)
- Orions Belte feat. Aase, Sigrid
- Orions Belte feat. Lerche, Sondre
- Orishas (cuban hip hop group)
- Orishas feat. Buenaventura, Yuri