- O
- OO
- OO
- OO
- OO
- OOak
- OakObe
- ObeObl
- OblOb
- ObvOce
- OceOch
- OchOct
- OctOdd
- OddOde
- OdeOdi
- OdiODZ
- ODZOfe
- OfeOff
- OffOgb
- OgbOh
- OhOha
- ohaOi
- OiOjo
- Ojooka
- OkaOku
- OkuOla
- OlaOld
- OldOle
- OleOle
- OleOli
- OliOli
- OliOls
- OlsOMA
- OmaOma
- OmaOme
- OmeOmn
- OMNON
- ONOne
- OneOne
- OneOne
- OneOne
- OneONL
- ONLOno
- Onoooe
- oofOpa
- OpaOpe
- Ope
- OppOr
- OrOra
- OraOrb
- orbOrc
- OrcOrd
- OrdORG
- OrgOri
- ORIOri
- OriOrl
- OrlOro
- OroOrq
- OrqOrt
- OrtOry
- OryOsb
- OsbOse
- OSEOsm
- Osm
- OstOte
- OteOto
- OTPOtt
- OttOub
- OubOur
- OurOut
- OutOut
- OutOut
- OutOve
- OveOve
- OveOwa
- OwaOWI
- OwiOxi
- OxiOza
- OzaOzo
- OzoOZZ
- Organ Beats, The
- Organ Donor (Richmond, VA Death Metal Band)
- Organ Donor (early 2000s rock band)
- Organ Donors (hard dance group)
- Organ Freeman (US)
- Organ Tapes
- Organ, Samuel
- Organ, Samuel feat. Dazey
- Organ, The
- Organ, Tyne-James
- Organ, Tyne-James & Gordi
- Organ, Willy (Belgian weirdo synthpop artist Simon Platteau)
- Organectomy (New Zealand brutal death metal)
- Organek, Tomek
- Organic Audio
- Organica
- Orgânico, Mirele & Froid
- Organised Scum
- Organism, The
- Organismen (Swedish rapper)
- Organismen & Large, DJ
- Organismen & Large, DJ
- Organiz' (French R'n'B duo)
- Organización X
- Organización, La
- Organization, The (90s US funk metal band)
- Organized Family (Zambian music duo)
- Organized Konfusion (US alternative hip hop duo from Queens, NYC)
- Organized Noize (Atlanta hip-hop production group)
- Organizing Committee, The
- Organizm
- Orgasmo (Bolivian Funk Rock Band)
- ORGAVSM
- Orgel Sound J‐pop (orgel group)
- Orgel, Matthew
- Orgg
- Orgi-E (Danish Rapper)
- Orgi-E feat. Jooks
- Orgi-E feat. Marwan
- Orgi-E feat. Winther, Bjarke
- Orgi-E feat. Xander
- Orgil
- Orgnn
- Orgnners, The
- Orgonášová, Ľuba, Slovenského rozhlasu, Symfonický orchester, Humburg, Will
- Orgone (US funk band)
- Orgone feat. de León, Adryon
- Orgone feat. Franklin, Fanny
- Orgonite (Rave band based in israel)
- Orgullo Nativo
- Orgy (US rock band)
- Orhan, Mahmut
- Orhan, Mahmut & Colonel Bagshot
- Orhan, Mahmut & Eneli
- Orhan, Mahmut, Arutan, Ali & Selin
- Orhan, Sevcan
- Orhon, Cüneyd
- Orhon, Ozan
- Orhon, Özdal (Turkish Art Music performer)
- Ori (folktronica singer songwriter Ori Alboher)
- Ori, Viktor
- Oria
- Oria (Progressive Groove Metal, Thessaloniki, Central Macedonia)
- Oria (French singer)
- Oriach, Riccie (Tropical artist from the dominican republic)
- Oriain, Charlie
- Oriakhi, Davina
- Orialus
- Oriana (Argentine model, actress and singer)
- Oriana Nash (American singer-songwriter, Oriana Isabel Nash)
- Orianthi
- Orianthi & Bonamassa, Joe
- Óriás (Hungarian rock band)
- Oribasi, Lisa (Swiss singer‐songwriter)
- Oribu
- Orician (Trance and progressive house producer)
- ORIE.
- Oriel (previously Oriel Poole)
- Oriel, Jonathan
- Orielles, The
- Orient Expressions
- Orient Expressions feat. Aynur
- Orient Fall (modern progmetal band)
- Orient Pearl
- Oriental Sunshine
- Oriental Wind
- Orientales, Les
- Oriente (Rap group)
- Oriente, Luz, Cynthia & Delacruz
- Orig. Alpenland Quintett
