- O
- OO
- OO
- OOak
- OakOb
- ObeObo
- OBOOce
- OceOch
- OchOct
- Odd
- OddODM
- ODOOf
- OfOff
- OFFOgr
- OgrOh
- OhOIR
- OirOKA
- OkaOku
- OkuOla
- OlaOld
- OldOli
- OliOli
- OliOls
- OlsOMA
- OmaOme
- OmeOmo
- OMPOnd
- One
- OneOne
- OneOni
- OniOno
- OnoOom
- OomOpe
- OpeOpp
- OppOra
- OraOrb
- OrbOrc
- OrcOrg
- OrgOri
- OriOrk
- OrkOrp
- OrpOrr
- OrrOrv
- OrvOsb
- OsbOsi
- OsiOst
- OstOth
- OthOtt
- OttOue
- OugOut
- OutOut
- OutOut
- OutOve
- OveOVR
- ovrOwl
- OwlOxx
- OxyOZR
- ozz
- Organectomy (New Zealand brutal death metal)
- Organek, Tomek
- Organic Audio
- Organica
- Organised Scum
- 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 Konfusion feat. Hurricane G
- Organized Konfusion feat. Rude One, DJ
- Organized Noize (Atlanta hip-hop production group)
- Organized Rhyme
- Organizing Committee, The
- ORGAVSM
- Orgel Sound J‐pop
- Orgi-E (Danish Rapper)
- Orgi-E feat. Winther, Bjarke
- Orgil
- 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 & Şener, Sena
- Orhan, Sevcan
- Orhon, Cüneyd
- Ori (folktronica singer songwriter Ori Alboher)
- Ori, Viktor
- Oria (Progressive Groove Metal, Thessaloniki, Central Macedonia)
- 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
- Oribasi, Lisa (Swiss singer‐songwriter)
- Oribu
- Orielles, The
- Orient Expressions
- Orient Expressions feat. Aynur
- Orient Fall (modern progmetal band)
- Orient Pearl
- Oriental Sunshine
- Oriente (Rap group)
- Orig. Alpenland Quintett
- ORIGA (Russian singer active in Japan)
- Origami Angel
- Origami Button
- Origami Tsunami (Alternative band from Manchester)
- Origamibiro
- Origen
- Origene
- Origin (Kansas metal band)
- Origin Unknown (UK drum & bass producers Andy C & Ant Miles)
- Origin, The
- Originais do Samba, Os
- Originais do Samba, Os & Xis
- 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
- 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
