- O
- OO
- OO
- OO
- OO
- OOak
- OakObe
- ObeOBL
- OblObs
- Obsoce
- OceOce
- oceOct
- OctOda
- OdbOdd
- OddOde
- OdeODU
- ODUOf
- OfOff
- OFFOfi
- Ofiogo
- OGROh
- OhOhi
- OhiOIL
- OilOk
- OkOke
- OkeOl
- OlOla
- OlaOld
- OldOl
- OlOlg
- OlgOli
- OliOli
- OliOls
- OlsOMA
- OmaOma
- OmaOme
- OmeOmn
- OmnOn
- OnOne
- ONEOne
- OneOne
- OneOne
- OneONJ
- OnkOnn
- ONOOny
- OnyOos
- OosOpe
- OpOpi
- OpiOpu
- OpuOra
- Oraorb
- OrbOrc
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- OrcOre
- OreOrh
- OrhOri
- ORIOrk
- OrkOrn
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- OrqOrr
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- OrtOsa
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- OscOsk
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- OssOT
- OtaOth
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- OttOur
- OurOut
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- OutOut
- OutOv
- OvOve
- OveOve
- OveOwe
- OweOwl
- OwlOxl
- Oxl
- OzaOzo
- OzoOzz
- Olga Aref'eva i Kovcheg
- Olga Chorens & Tony Álvarez (Cuban Duo)
- Olga Vocal Ensemble
- Olgas Boris
- Olgun, Soner (Turkish musician)
- Olhava (Russian blackgaze)
- Olho Seco
- OLI (UK singer- songwriter)
- Oli Barton & The Movement
- Oli Fox
- Oli P.
- Oli P. & Emilia
- Oli P. & Felix Harrer
- Oli P. feat. Emilia
- Oli P. feat. Frank, Tina
- Oli XL
- Oli XL ft. Ecco2K
- Oli&Taj
- Olialia Pupytės (Lithuanian band)
- Oligar
- Olimareños, Los
- Olimpia (not the Italian singer)
- Olin and the Moon (LA)
- Olin Janusz (Most recent album released under his real name.)
- Olina (Greek London-based indie songwriter)
- Olinescu, Mălina (ESC 1998 for Romania)
- Olio
- Olio su Telnet
- Olioso, Dolores
- Olipage (folk/pop singer from Montreal, QC, Canada)
- Oliphant, Grassella Quartette
- Oliva (solo band of Jon Oliva)
- Oliva Trencada
- 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)
- Olivatto, Sil
- Olive (UK dance/breakbeat/trip‐hop group)
- Olive (Indonesian jazz singer Olivia Latuputty)
- Olive (Los Angeles based visual and audio artist)
- Olive B
- Olive Black
- Olive Drab
- Olive et moi
- Olive the boy
- Olive, DJ (USA based DJ & remixer Gregor Asch)
- Oliveira MC 011, DJ 7W & DJ MENOR NK
- Oliveira, Dalva de (Brazilian singer)
- Oliveira, Diego
- Oliveira, Diógenes L.
- Oliveira, Douglas and The Red Dogs
- Oliveira, Eliã (Brasil Gospel)
- Oliveira, Elmar (violinist)
- Oliveira, Gloria de
- Oliveira, Gloria de & Hurley, Dean
- Oliveira, Jacques
- Oliveira, Jair
- Oliveira, Jairzinho
- Oliveira, Judson
- Oliveira, Michel
- Oliveira, Nina
- Oliveira, Nina & Fióti
- Oliveira, Paula & Moreira, Bernardo
- Oliveira, Reese
- Oliveira, Reese, One Voice Children’s Choir, Mitch Bandley, Armanie Wright, Caldwell, Matthew, Kami Bromley, Macy Hanks, Isabel Oakeson, Sidnie Anderson, Meggie Sorensen & Mattea Denney
- Oliveira, Simone de (Portuguese singer and actress)
- Oliveira, Teago
- Olivella, Carlos Mario
- Olivencia, Tommy
- Olivencia, Tommy feat. González, Sammy
- Olivencia, Tommy feat. Guzmán, Paquito & Pérez, Simón
- Olivencia, Tommy feat. Pérez, Simón
- Olivencia, Tommy y su Orquesta
- Olivencia, Tommy y su Orquesta
- Olivensteins, Les
- Oliver (late 60s/early 70s US pop singer)
- Oliver (nu-disco electronic duo)
- Oliver (LA Music production/DJ duo)
- Oliver (Finnish band)
- Oliver (Argentinian punk rock band)
- Oliver Boyd and the Remembralls
- Oliver Dollar
- Oliver Dollar & Jules, Jimi
- Oliver Dragojević & Dalmatino
- Oliver Dragojević & Davor Radolfi
- Oliver Dragojević & Duo Mariol
