- O
- OO
- OO
- OOak
- OakObe
- ObeObr
- ObrOce
- OceOch
- OchOct
- OctOde
- Odeodo
- OdoOf
- OfOff
- OffOgr
- OgrOha
- OhaOis
- OisOka
- OkaOku
- OkuOld
- OldOld
- OldOli
- OliOli
- OliOls
- OlsOma
- OmaOMF
- OMFOn
- OnOne
- OneONE
- ONEone
- OneOnk
- ONLOnt
- ontOor
- OOpe
- OpeOpu
- OpuOra
- OraOrc
- OrcOrd
- OrdOrh
- OrhOri
- OriOrl
- OrlOrq
- OrqOrt
- OrtOsa
- OsaOsc
- Oscoso
- OsoOta
- OtaOtr
- OtrOtt
- OttOur
- OurOut
- OutOut
- OutOve
- Oveovg
- OviOwe
- OweOxi
- Oxi
- ozz
- 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)
- Oldods
- 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. Wainwright, Karen J.
- 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)
- Olga (Finnish singer and actress Olga Heikkala)
- Olgun, Soner
- Olhava (Russia / Atmospheric/Post-Black Metal)
- Olho Seco
- OLI (UK singer- songwriter)
- Oli Barton & The Movement
- Oli Fox
- Oli P.
- Oli P. & Emilia
- 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
