- O
- OO
- OO
- OO
- OO
- OOak
- OakObe
- ObeObl
- oblObs
- ObsOce
- OceOch
- OchOct
- OCTOdb
- ODCOdd
- OddOde
- OdeODU
- ODUOf
- OfOff
- OffOff
- OfiOGR
- OGROh
- OhOhi
- OhiOim
- OimOK
- OKOke
- OkeOl
- OlOla
- OlOld
- OldOle
- OleOlg
- OlgOli
- OliOli
- OliOls
- OlsOma
- OmaOma
- OmaOme
- OmeOmn
- OmnOn
- OnOne
- ONEOne
- OneOne
- OneOne
- OneONJ
- OnkONO
- OnoOny
- OnyOos
- OosOp
- OpeOpi
- OpiOpu
- OpuOra
- OraOrb
- OrbOrc
- OrcOrd
- OrdOre
- OreOrh
- OrhOri
- OriOrk
- OrKOrn
- OROOrq
- OrqOrr
- OrrOrt
- OrtOsa
- OsaOsc
- OscOsk
- OSKOss
- Oss
- OtaOth
- Othott
- OTTOtt
- OttOur
- OurOut
- OutOut
- OutOut
- OutOv
- OvOVE
- OveOve
- OveOwe
- OweOwl
- OwlOxl
- OxmOza
- OzaOzo
- OzoOzz
- Otaku (Ren Avel)
- Otala (Post-rock quartet from Nottingham, UK)
- Otani, Kow (Japanese anime, film & video game composer)
- Ōtani, Tomoya
- Ōtani, Tomoya feat. Kirk-Holmes, Merry
- Ōtani, Tomoya feat. Quinn, Kellin
- Otargos
- Otarion
- Otava Yo
- otay:onii
- OTB Fastlane
- OtC
- OTE
- OTE feat. Ellis, Steven
- Otecko (Slovak MC (H16))
- Otecko feat. Cigo & Igor
- Otecko feat. Smack
- Otecko feat. Spirit, Majk
- Otem Rellik
- Otenki
- Otep
- Otero, Adrián
- Otero, David (00s Spanish musician)
- Otero, David & Adelén
- Otero, David & Basarte, Bely
- Otero, David & Carlos Sadness
- Otero, David & Cepeda
- Otero, David & Fernández, Dani
- Otero, David & Guerra, Ana
- Otero, David & Mäbu
- Otero, David & Soto, Marta
- Otero, David & Taburete
- Otero, David feat. Torres, Iván
- Otero, David ft. Adelén
- Otero, David ft. Arnau Griso & Nil Moliner
- Otero, David ft. Basarte, Bely
- Otero, David ft. Carlos Sadness
- Otero, David ft. Cepeda
- Otero, David ft. Despistaos
- Otero, David ft. Fernández, Dani
- Otero, David ft. Georgina & Funambulista
- Otero, David ft. Guerra, Ana
- Otero, David ft. Mäbu
- Otero, David ft. Soto, Marta
- Otero, David ft. Taburete
- Otero, David ft. Torres, Iván
- Otero, David, Nil Moliner & Arnau Griso
- Otero, Manolo
- Otero, Willito
- otetsu
- otetsu feat. GUMI
- Otey, Lisa
- OTF Boonie Moe
- OTF Boonie Moe, Rob49 & Only the Family
- Otgoo
- OTH
- Otha (Othalie Husøy)
- Othalan (Polish Folk Metal)
- Othello (Théo Celino)
- Other Colors, The
- Other Ego
- Other End, The (Norwegian duo)
- Other Favorites, The
- Other Four, The (1960s garage band from San Diego, CA)
- Other Guys, The (Scottish A Cappella Group)
- Other Half (UK punk band)
- Other Lives (US indie rock band)
- Other Minds (Alternative Rock Band)
- Other Noises
- Other Ones, The (Australian-German band, hit single "Holiday")
- Other Other Brothers, The
- Other Stars, The (Indie Rock)
- Other Tribe, The
- Other Two, The
- Other Voices (Italian goth)
- Other Years, The
- Other-ed
- Other, The (horrorpunk band from Germany)
- Other, The & Ferro, Leo
- Otherkin
- OTHERLiiNE (George Fitzgerald & Lil Silva)
- Others by No One
- Others, The (UK dubstep producer)
- Others, The (2000s UK rock band)
- Others, The feat. Geoff Smith
- Otherside, The (80s Dutch beat group)
- Otherside, The (US psychedelic band)
- Otherview
- Otherwise (US hard rock band)
- Otherwise feat. Costello, Ashley
