- O
- OO
- OO
- OOak
- OakOBG
- ObiObs
- ObsOce
- OceOct
- OctODD
- OddODE
- ODEOdy
- OdyOff
- OffOga
- OgaOh
- Ohohs
- OhtOK
- OKOko
- OkoOla
- OLAOld
- OldOli
- OliOli
- OliOls
- OlsOm
- OmaOmi
- OmiOn
- OnOne
- OneOne
- OneOne
- OneOnl
- OnlOob
- OobOpe
- OpeOpp
- OppOra
- OraOrb
- OrbOrd
- ORDOrg
- OrgORI
- OriOrl
- OrlOrq
- OrqOrt
- OrtOsa
- OsaOsc
- OsdOso
- OsoOte
- OteOtt
- OttOua
- OuaOut
- OutOut
- OutOut
- OutOve
- OveOvy
- OWOwl
- OwlOza
- OzaOZZ
- Olson, Carla & Taylor, Mick
- Olson, Danny
- Olson, Evan
- Olson, Luke
- Olson, Mark (US alt. country musician, Jayhawks etc)
- Olson, Mark & Creekdippers, The
- Olson, Mark & Louris, Gary
- Olson, Mark & The Creekdippers
- Olson, Mark and the Original Harmony Ridge Creekdippers
- Olson, Michael (US christian singer, songwriter & drummer)
- Olson, Olivia (American actress, singer-songwriter)
- Olsson (key track “Hold On”)
- Olsson feat. Mapei
- Olsson, Albin
- Olsson, Björn
- Olsson, Felicia
- Olsson, Kurt
- Olsson, Leif "Loket"
- Olsson, Linnea (singer‐songwriter and cellist)
- Olsson, Nigel
- Olsson, P.J.
- Olsson, Viktor (Swedish singer/songwriter)
- Olstead, Renee
- Olstead, Renee feat. Botti, Chris
- OLTAS (Oldskool doom- en deathmetal uut 'e Walden!)
- Oltmans, Tinne (Belgian actress & singer)
- Olu Maintain
- OLUGBEMI, JOSEPH (UK Artist)
- Olusola, Kevin
- Oluwajesse
- Ölveti Blues Band
- Olvidados, Los (Skate punk band from San Jose, CA)
- Olvidados, Los (Bolivian band)
- Olvido (melodic/gothic metal)
- Oly (American singer-songwriter, Lianna Sylvan)
- Oly (@Southwrld_9)
- Oly. (from Poland, on Nextpop label)
- Olympe (French singer of The Voice 2)
- Olympia (Melbourne singer)
- Olympians (Norwich Crunch Pop band)
- Olympic (Czech big beat band)
- Olympic Ayres
- Olympic Swimmers
- Olympics, The (US doo wop group)
- Olympiou, Despoina (Despoina Olympiou)
- Olympique
- Olympus Mons
- Olzon, Anette
- Om (US stoner/doom metal band)
- Om (Lost at Last)
- OM ("Singer" "Sober" "Reezons")
- om la luna
- Om Unit
- OMA (Hip-hop instrumentals)
- Oma 206
- Omagh Community Youth Choir
- Omaha Bitch
- Omaji, Tim (Australian singer-songwriter formerly known as Timomatic)
- Omar (British soul singer Omar Lye-Fook)
- Omar (R&B)
- Omar (German hip-hop)
- OMAR (German rapper)
- OMAR & AK 33
- OMAR & NGEE
- Omar & Stone, Angie
- Omar & Zed Bias
- Omar and the Howlers (Blues Rock, Jump-Blues, US)
- Omar Courtz (Joshua Omar Medina Cortes)
- OMAR EC
- Omar Enrique
- Omar Enrique feat. Herrera, Eddy
- Omar Enrique feat. Ilegales
- Omar Enrique feat. Vargas, Sergio
- Omar feat. Ol’ Dirty Bastard
- Omar feat. Palladino, Pino
- Omar feat. Stone, Angie
- Omar feat. Wonder, Stevie
- Omar feat. Zed Bias
- Omar Rodriguez Music (Christian music singer, sonwriter, & producer)
- Omar Rodriguez Music & Conslie, Lucas
- Omar Rodriguez Music & Fdz, Ale
- Omar Shané
- Omar-S
- Omar-S feat. John F.M.
- Omar, E.T Yomille (aka El Tío)
- Omar, Nelly (Argentine tango singer)
- Omar, Rex
- Omär, Xavier (Chicago Artist)
- Omär, Xavier & Isley, Alex
- Omär, Xavier & Sango
