- O
- OO
- OO
- OOak
- OakObe
- ObeObs
- ObsOce
- OceOct
- OctOdd
- OddODE
- ODEOdy
- OdyOff
- OffOG
- Oh
- OhOhr
- OhrOk
- OKOkm
- OKOOla
- OlaOld
- OldOli
- OliOli
- OliOls
- OlsOma
- OmaOmi
- OmiOn
- OnOne
- OneOne
- OneOne
- OneOnl
- OnlOnz
- OOBOpe
- OpeOpo
- OpoOra
- OraOrb
- OrbOrc
- OrcOrg
- OrgOri
- OriOrl
- OrlOrp
- OrpOrt
- OrtOsa
- OsaOsc
- Oscoso
- OsoOte
- OteOts
- Ots
- Out
- OutOut
- OutOut
- OutOve
- OVEOvn
- OvnOwl
- OwlOys
- OysOzy
- OzzOZZ
- Oldblood (Blackened Doom/Post from UK)
- OLDCODEX
- Olde Throne
- Oldelaf
- Oldelaf et Monsieur D.
- Olden, Lise
- Oldest Sea
- Oldfield, Mike
- Oldfield, Mike & Anderson, Jon
- Oldfield, Mike feat. Chapman, Roger
- Oldfield, Mike feat. Westenra, Hayley
- Oldfield, Mike with Anderson, Jon
- Oldfield, Sally
- Oldfield, Sally feat. Oldfield, Mike
- Oldfield, Terry
- Oldfield, Terry & Garo, Carlos
- Oldfield, Terry & Saraswati, Soraya
- Oldfield, Wendy
- Oldham Tinkers, The
- Oldham, Andrew, Orchestra, The
- Oldham, Will
- Oldhead
- Oldians, The (ska jazz band from Barcelona, Spain)
- OldPee (13 Block)
- Olds, Jerome
- Oldsoul
- Oldu O Zaman
- Ole 60
- Ole Erling
- Ole I'Dole
- Ole Ivars
- Olé Olé
- Olé Olé con Diges, Daniel
- Olé Olé con Materia Prima
- Olé Olé Con Modestia Aparte
- Olé Olé Con Norte, El, Segura, Santiago, Modestia Aparte, Antonio Albella Y Pingüino en mi ascensor, Un
- Olé Olé con San Basilio, Paloma
- Ole, Olli
- Oleander
- Oleg (electropop)
- Olejniczak, Janusz (pianist)
- Oleksza
- Olemus
- Olen
- Olender, Al
- Olenius, Adam
- Olenka & the Autumn Lovers
- Olestar, Los
- Olexandr Ignatov
- Olexesh (German rapper)
- Olexesh & AJÉ
- Olexesh & AK Ausserkontrolle
- Olexesh & Amo
- Olexesh & Azzi Memo
- Olexesh & Bonez MC
- Olexesh & Capital Bra
- Olexesh & Haaland936
- Olexesh & Katch, DJ
- Olexesh & Nimo
- Olexesh & O.G.
- Olexesh feat. AJÉ
- Olexesh feat. Blumenblatt, Marla
- Olexesh feat. Ćelo & Abdï
- Olexesh feat. Ćelo & Abdï & Chaker
- Olexesh feat. Ćelo, Abdi & Hanybal
- Olexesh feat. Edin
- Olexesh feat. Eko Fresh
- Olexesh feat. Hanybal
- Olexesh feat. Karate Andi
- Olexesh feat. Nimo
- Olexesh feat. Sido
- Olexesh feat. Veysel
- Olexesh feat. Yasha
- Olexesh, Calo & Fouine, La
- Olexesh, Casper & Yung Hurn
- Olexesh, Ćelo & Abdï
- Olexesh, Hanybal & Young Buck
- OLF
- Olga (Olga Blues Babe aka Laolga)
- Olgun, Soner
- Olhava (Russia / Atmospheric/Post-Black Metal)
- Olho Seco
- OLI (UK singer- songwriter)
- Oli Barton & The Movement
- Oli Fox
- Oli P.
- Oli P. feat. Emilia
- Oli XL
- Olialia Pupytės (Lithuanian band)
- Oligar
