- O
- OO
- OO
- OOak
- OakObi
- ObiObs
- ObsOCE
- OceOct
- octOdd
- OddOdi
- OdiOf
- OfOff
- OffOh
- ohohG
- OhgOji
- OJMokh
- OKIOla
- OlOld
- OldOli
- OliOli
- OliOls
- OlsOMB
- OMBOmn
- OmnOnb
- OncOne
- OneOne
- OneOni
- ONJont
- OntOos
- OotOph
- OphOR
- OrOrb
- OrbOrc
- OrcORE
- OreOri
- OriOrl
- OrlOrp
- OrpOrt
- OrtOsb
- OsbOsi
- OsiOst
- OstOth
- OthOtt
- OttOur
- OurOut
- OutOut
- OutOve
- OveOvi
- OviOwl
- OwlOye
- Ozy
- OzzOZZ
- Offset feat. Future
- Offset feat. Scott, Travis
- Offspring (UK punk band)
- Offspring (pop)
- Offspring (70s prog rock)
- Offspring, The (American punk)
- Offspring, The feat. Redman
- OffTopic (Hungarian pop punk)
- Oficina Blues
- Oficina G3 (Braziliam Christian Band)
- OFK (We are OFK)
- OfMan, Lewis
- Ofner, Dominik (Austrian Singer, Band, Folk, Pop)
- Ofnus (Atmospheric Black metal band from Wales)
- Oforia
- Ofrin (Israeli singer based in Berlin, Germany and Tel Aviv, Israel)
- oftn
- OG BraX (Swiss rapper)
- OG Buda (Russian rapper)
- OG Buda feat. lil krystalll
- OG Florin (Swiss rapper)
- OG Hindu Kush
- OG Keemo (German rapper)
- OG Keemo & Kwam.E
- OG Keemo & Liam, Levin
- OG Keemo & Souly
- Og Kush Salamanda (Lazy Lizzard Gang member)
- OG LU
- OG Maco
- OG Maco & Key
- OG Prince (Russian rapper)
- OG Ron C (Texas-based Swishahouse member & screw DJ Ronald Coleman)
- OG Semi‐Auto (US rapper)
- Ogada, Ayub
- Ogando, Gabriel
- Ogata, Megumi
- Ogawa, Michiko, Trio, The
- Ogawa, Noriko (pianist)
- OGB
- Ogbert the Nerd
- Ogbon, Lord Jah-Monte (US rapper a.k.a. Jah-Monte)
- Ogden Edsl
- Ogden, Craig (guitarist)
- Ogden, Jonathan
- Ogdon, John (pianist and composer)
- Ogeday
- Ogee (French singer‐songwriter)
- Ogemaw County (Detroit, Michigan based metalcore act)
- Ogen
- Ogeret, Marc
- Ogfrankie
- Oghre (Metal band from Rīga, Latvia)
- OGI (Brazilian)
- Ogi (Nigerian‐American singer, songwriter and multi‐instrumentalist)
- Ogi, DJ
- Ogikubo Station
- Ogilvie, George
- Oginome, Yoko (Pop idol, actress & voice actress)
- OGK4Lyf
- Ognevich, Zlata
- OGR-Scintilla
- OGR-Scintilla ft. Young Poutine
- Ogre (Stoner group from Raymond, ME, United States)
- OGRE (Composer & sound designer from UK, Robin Ogden)
- OGRE Sounds
- Ogre You Asshole
- Ogres de Barback, Les
- Ogres de Barback, Les & Fanfare du Belgistan, La
- Ogres de Barback, Les & Hurlements d'Léo, Les
- Ogres de Barback, Les feat. Hurlements d'Léo, Les
- Ogres de Barback, Les feat. Lacaille, René, Lacaille, Oriane, Lacaille, Marco & Ogrillons, Les
- Ogres de Barback, Les feat. Lo'Jo & Eyo'nlé, Fanfare
- Ogres de Barback, Les feat. Marco
- Ogres de Barback, Les feat. Néry
- Ogres de Barback, Les feat. Perret, Pierre
- Ogres de Barback, Les feat. Têtes Raides
- Ogün, Buddy (German Artist)
- Oğur, Erkan
- Oğur, Erkan & Demircioğlu, İsmail Hakkı
- Oğur, Erkan & Demircioğlu, İsmail Hakkı
- Oğur, Erkan & Gasparyan, Djivan
- Oğur, Erkan & Öztürk, Okan Murat
- Ogura, Yui (Japanese actress, voice actress & singer)
- Oguretz, DJ
- Oğuzhan Koçalan
- OGXO
- Oh Astro
- Oh Bummer!
- Oh Chill (South Korea)
- Oh Darling