- O
- OO
- OO
- OO
- OOaf
- OAFOaK
- OakOBE
- ObeObn
- OBO
- Oce
- OceOCS
- OCTOct
- OctOdd
- OddODE
- ODEOdo
- OdoOf
- OfOff
- OffOff
- OfiOgr
- Ogroh
- OhOHN
- OHNOiz
- OizOka
- OKAOkl
- OklOla
- OlaOld
- OldOld
- OldOle
- OleOli
- OliOli
- OliOls
- OlsOm
- OmOma
- OmaOMG
- OMGOmo
- OmoOna
- OnaOne
- OneONE
- ONEOne
- ONEOne
- OneOnl
- OnlOns
- OnsOom
- OomOpe
- OpeOpg
- OpgOpt
- OptOra
- OraOrb
- OrbOrc
- OrcOrc
- orcOre
- OreOrh
- OrhOri
- ORIOrk
- ORKOro
- OroOrq
- OrqOrs
- OrsOrt
- OrtOsb
- OsbOsc
- OscOsl
- OslOst
- Ote
- OteOTR
- OTROtt
- OttOug
- OugOus
- OusOut
- OutOut
- OutOut
- OutOve
- OveOve
- OVEOwe
- OweOwl
- Owl
- Oxx
- Ozz
- Ozzozz
- Olexesh, AJÉ & Ramazan
- Olexesh, AJÉ, Ramazan & Bilel
- Olexesh, AJÉ, Ramazan & Yassin
- Olexesh, Ataypapi, ilo 7araga & Chekaa
- Olexesh, Azzi Memo & Zack Ink
- Olexesh, Calo & Fouine, La
- Olexesh, Casper & Yung Hurn
- Olexesh, Ćelo & Abdï
- Olexesh, Hanybal & Young Buck
- Olexesh, Hell Yes & Ezhel
- Olexesh, Hell Yes & Graf, Esther
- Olexesh, Hell Yes & Joker Bra
- Olexesh, Jala Brat, Corelli, Buba & Katch, DJ
- Olexesh, LX & Hell Yes
- Olexesh, Moe Phoenix & DeeVoe
- OLF
- Olga (Olga Blues Babe aka Laolga)
- Olga (Finnish singer and actress Olga Heikkala)
- Olga & Elliot, Isac
- Olga Chorens & Tony Álvarez (Cuban Duo)
- 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. 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
- 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)
- 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, 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
- Olivencia, Tommy
- Olivencia, Tommy feat. González, Sammy
- Olivencia, Tommy feat. Guzmán, Paquito & Pérez, Simón
- Olivencia, Tommy feat. Pérez, Simón
- Olivencia, Tommy feat. Tricoche, Héctor
- Olivencia, Tommy y su Orquesta
