- O
- OO
- OO
- OOak
- OakObe
- ObeObr
- OBSOce
- OceOch
- OchOct
- OctOde
- OdeOdo
- OdoOf
- OfOff
- OffOgr
- OgrOha
- Oiz
- OizOka
- OKAOkw
- OkYOld
- OldOld
- OldOli
- OliOli
- OliOls
- OlsOm
- OmOmi
- OmiOn
- OnOne
- OneOne
- OneOne
- OneOnl
- Onlonu
- OnuOos
- OotOpe
- OpeOpu
- OpuOra
- OraOrc
- OrcOre
- OreOri
- OriOri
- ORIOrn
- OrnOrq
- OrqOrt
- OrtOsb
- Osbosh
- OshOSR
- OssOte
- OteOtt
- Ott
- Ous
- OutOut
- OutOut
- OutOve
- OveOvi
- OviOwi
- OwiOxm
- OxmOzo
- Ozoozz
- OnePhatDeeva
- ONEPIXCEL
- oneproudmonkey
- ONER (Chinese Group)
- OneRepublic
- OneRepublic & Alesso
- OneRepublic & Khea
- OneRepublic & Seeb
- OneRepublic feat. Amir
- OneRepublic feat. Cassius
- OneRepublic feat. Gabriel, Peter
- OneRepublic feat. Santigold
- OneRepublic feat. Timbaland
- OneRepublic vs. Alesso
- OneRepublic x Assassin’s Creed x Mishaal Tamer
- ones (electronic)
- ones feat. just lil
- Ones You Forgot
- Ones, The (US EDM band)
- Ones, The (80s Punk n' Roll band from Milwaukee, WI)
- Onesa, Paolo
- OneSideZero
- Onestar (former member of Monday Kiz)
- Onete, Dona
- Onething Live (Live Recordings from Onething Conference)
- Onetox (Solomon Island reggae/ragga band)
- onett
- Onetwo (synthpop duo Claudia Brücken & Paul Humphreys)
- OneUp Studios
- OneUps, The
- ONEUS
- OneVoice
- OneVoice Gospel Choir
- ONEW (Lee Jin-ki, member of SHINee)
- ONEWE
- ONEWE & ONEUS
- Oneworld (Dave Randall & friends)
- OneWorld (Current Solo project Sander van der Waal)
- Onexx (Crossover Band from Bonn, Germany)
- Oney (hard rock)
- Öney, Feryal
- Oney1
- ONF
- Ong, Daryl
- Ong, Olivia
- Ongala, Remmy & Orchestre Super Matimila
- Ongoing Concept, The
- Onheil (Dutch blackened/melodic thrash/death metal)
- ONI (Canadian Progressive Metal Band)
- Oni Cea$
- ONI INC.
- Oni Rock (Brazilian rock band)
- ONI, Jones, Howard & Gilbert, Josh
- ONIGAWARA
- Onike, Abdul
- Onile, Marie
- Onion Flavored Rings
- ONIONRING (Japanese rock band)
- Onionz
- Onionz feat. S.n.o.w
- Onirama
- Oniric (Italian dark folk duo)
- Onirismo
- Onirophagus
- Onis, Manuel
- Onishi, Junko, Trio
- Onision
- Onitsha
- Onitsuka, Chihiro
- Ónix Ensamble (Mexican chamber music group)
- Oniyama, Josephine
- ONJ, JON
- ONJUICY (Japanese grime MC and electronic musician)
- Onk Lou
- Onkalo (Finnish doom metal band)
- Onkar, Dan
- Onkel Kånkel & His Kånkelbär (The Band)
- Onkel Tom Angelripper
- Onkel Tuka
- OnklP
- OnklP & Slektningene, De Fjerne
- ONLAP (Alternative Rock band from Paris)
- ONLEE (former member of 1THE9)
- Online (canadian hip hop)
- onlinefriends
- Onlooker (UK garage punk)
- Only (Album “Immortal”)
- ONLY (Berlin screamo band)
- Only Attitude Counts (Vienna Style Hardcore Kings)
- Only Boys Aloud
