- 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
- OrcOrc
- OrcOre
- OreOrh
- OrhOri
- ORIOrk
- OrkOrn
- OrnOrq
- OrqOrr
- OrrOrt
- OrtOsa
- OsaOsc
- OscOsk
- OskOss
- OssOT
- OtaOth
- OthOtt
- OttOtt
- OttOur
- OurOut
- OutOut
- OutOut
- OutOv
- OvOve
- OveOve
- OveOwe
- OweOwl
- OwlOxl
- Oxl
- OzaOzo
- OzoOzz
- Oberbaum (German/Belgian artist Lucie Rezsöhazy)
- Oberer Totpunkt
- Oberg
- Öberg, Andreas
- Öberg, Linn
- Öberg, Mats
- Oberg, Uwe
- Oberhofer (Brooklyn, NY band of Brad Oberhofer)
- Oberhofer, Brad
- Oberkampf, Victoire
- Oberle, Gregory
- Obermeier, Barbara (musical theatre artist)
- Oberogo, Famous
- Oberogo, Famous & Frost, Damion
- Oberogo, Famous & Lacunza, Natalia
- Oberogo, Famous & Sango, Marta
- Oberogo, Famous & Villar, María
- Oberogo, Famous, Núñez, Miki & Sabela
- Oberogo, Famous, Núñez, Miki & Sabela
- Oberon (Greek psytrance)
- Oberon (space metal band from Ada, Oklahoma, USA)
- Oberon, DJ (UK techno/trance artist; Les Spalding)
- Oberpichler, Rale
- Oberritter Dóra ft. Lotfi, Begi
- Oberschlesien
- Oberst, Conor
- Oberst, Conor & Blondshell
- Oberst, Conor and Mystic Valley Band, The
- Oberti, Luca
- Oberti, Samuele
- Obeses
- OBESØN (toronto ambient, electronic, experimental, r&b, hip_hop)
- Obey City
- Obey Me! Boys (Obey Me! character group)
- Obey the Brave
- Obey the sun
- Obey, Ebenezer
- OBEYER
- Obfusc (Joseph X. Burke)
- OBGMs, The
- Obi (UK britpop band)
- Obi Best (formerly called Colorforms)
- Obia le Chef
- Obia le Chef avec Caballero & JeanJass
- Obiat
- Obibox
- Obie Hans
- Obie WanShot
- Obiedo, Ray
- Obieglo, Andreas
- Obiman
- Obin, André
- Obinrin Trio
- Obiols Campi, Arnau (Arnau Obiols Campi)
- Obispo, Pascal
- Obispo, Pascal & Angi, Giordana
- Obispo, Pascal & Cabrel, Francis
- Obispo, Pascal & Frégé, Élodie
- Obispo, Pascal & Gredy, Alexia
- Obispo, Pascal & Mars, Mélissa
- Obispo, Pascal & St-Pier, Natasha
- Obispo, Pascal avec Zazie
- Obispo, Pascal duo avec Calogero
- Obispo, Pascal feat. Baby Bash
- Obispo, Pascal feat. Calogero
- Obispo, Pascal feat. Casal, Luz
- Obispo, Pascal feat. Christophe
- Obispo, Pascal feat. Christophe
- Obispo, Pascal feat. Hallyday, Johnny
- Obispo, Pascal feat. La Troupe des Dix Commandements
- Obispo, Pascal feat. N'Dour, Youssou
- Obispo, Pascal feat. N’Dour, Youssou
- Obispo, Pascal feat. Pagny, Florent
- Obispo, Pascal feat. Stoner, Sam
- Obispo, Pascal feat. Zazie
- Obispo, Pascal, Willem, Christophe, Fiori, Patrick, Alizée
- Obito
- Obits
- Obituary (US death metal band)
- Object Heavy (soul/funk/r&b band from Arcata, CA, USA)
- Object Unto Earth
- Objekt (TJ Hertz)
- Objektif
- Objetivo Birmania
- Objeto Quase
- OBK (Spanish band)
- OBKATIEKAT
- OBLADAET (Russian rapper)
- OBLADAET & Enzo From The Block
- OBLADAET & lil krystalll
