- O
- OO
- OO
- OOak
- OakObi
- ObiObs
- ObsOce
- OceOct
- OctOdd
- OddOde
- OdeOef
- OehOff
- OffOgd
- OgdOh
- OhOi
- OiOk
- okOku
- OkuOld
- OldOld
- OldOli
- OliOli
- OliOls
- OlsOMB
- OMBOmn
- OmnO
- OnaOne
- OneOne
- OneOng
- OngOno
- OnoOom
- OomOpe
- OpeOpt
- optOra
- OraOrc
- OrcOrd
- OrdOrh
- OrhOri
- OriOrm
- OrmOrq
- OrqOrt
- OrtOsb
- OsbOsi
- OsiOst
- OstOth
- OthOtt
- OttOur
- OurOut
- OutOut
- OutOve
- OveOve
- OveOwe
- OweOxl
- OxlOzm
- OZMOZZ
- 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
- Oligarkh (Russian electronic group)
- Olimareños, Los
- Olin and the Moon (LA)
- Olin Janusz (Most recent album released under his real name.)
- Olio su Telnet
- Olioso, Dolores
- Olipage (folk/pop singer from Montreal, QC, Canada)
- Oliphant, Grassella
- Oliphant, Grassella Quartette
- Oliva (Solo band of Jon Oliva)
- Oliva, Carlos
- Oliva, Jon, Pain
- Olivares, Fito
- Olivares, Fito y La Pura Sabrosura
- Olivares, Pablo (Argentine Christian music singer)
- Olivarez, David
- Olivas, Alfredo (Regional Mexican singer and musician)
- Olivas, Karl
- Olive (UK dance/breakbeat/trip‐hop group)
