- O
- OO
- OO
- OOak
- OakObi
- ObiOBS
- ObtOce
- OceOct
- OctOdd
- OddOdm
- ODMOf
- OfOFK
- OfMOh
- OhOhm
- OhmOjo
- OKOkl
- OklOla
- OlaOld
- OldOli
- OliOli
- OliOly
- OlyOme
- OmeOmo
- OMOOnd
- OndOne
- ONEOne
- OneOnl
- OnlOob
- OobOpe
- OpeOpp
- OppOra
- OraOrc
- OrcOrd
- OrdOrh
- OriOri
- OriOro
- OroOrr
- OrsOs
- OsOsc
- Oscoso
- OsoOte
- OteOtt
- OttOui
- OuiOut
- OutOut
- OutOve
- OveOVE
- Owe
- OweOXO
- Oxo
- OZZ
- Os Vips (Os Vips)
- OS101 (hardcore punk band)
- Osa (El Caco frontman Øyvind Osa's solo project)
- Osa, Liv Bernhoft (Norwegian actress)
- Osada Vida
- Osadebe, Stephen Osita, Chief
- Osaen
- Osage Tribe
- Osaka Flu
- Osaka Monaurail
- Osaka Popstar
- Osaka Punch (Australian rock band, formerly The Kidney Thieves)
- Osaka Syunkasyuto
- Osaki (jazz hop)
- Osaki ft. Sleepermane
- Osaki, Nana starring Nakashima, Mika
- Osama GBS
- OsamaSon (underground artist)
- Osanna
- Osanzi
- Osasioo (Canadian RnB Artist)
- Osatia
- Osawa, Shinichi
- Osay (American rapper, singer-songwriter)
- Osaze feat. Veda, Jaidene
- Osborn Abigail
- Osborne (Todd Osborn)
- Osborne Brothers, The
- Osborne Brothers, The & Allen, Harley "Red"
- Osborne Brothers, The & Wiseman, Mac
- Osborne, Anders (US singer-songwriter)
- Osborne, Bertín
- Osborne, Bobby
- Osborne, David (Classical/covers pianist)
- Osborne, Jeffrey
- Osborne, Joan
- Osborne, Joan feat. Pavarotti, Luciano & East London Gospel Choir
- Osborne, Lee feat. Emery, Roxanne
- Osbourne, Johnny (Jamaican reggae singer)
- Osbourne, Kelly
- Osbourne, Ozzy
- Osbourne, Ozzy & Osbourne, Kelly
- Osbourne, Ozzy feat. Beck, Jeff
- Osbourne, Ozzy feat. Clapton, Eric
- Osbourne, Ozzy feat. Iommi, Tony
- Osbourne, Ozzy feat. Iommi, Tony & Wu‐Tang Clan
- Osbourne, Ozzy feat. John, Elton
- Osbourne, Ozzy feat. McCready, Mike
- Osbourne, Ozzy feat. Miss Piggy
- Osbourne, Ozzy feat. Osbourne, Kelly
- Osbourne, Ozzy feat. Post Malone
- Osbourne, Ozzy feat. Primus
- Osbourne, Ozzy feat. Rhoads, Randy
- Osbourne, Ozzy feat. Was (Not Was)
- Osbourne, Ozzy feat. Wylde, Zakk
- Osbourne, Ozzy feat. Zappa, Dweezil
- Osbourne, Ozzy w/Therapy?
- Osbourne, Ozzy with Iommi, Tony & Wu‐Tang Clan
- Osbourne, Ozzy with Osbourne, Kelly
- Osbourne, Ozzy with Rhoads, Randy
- Osbourne, Ozzy with Therapy?
- Osbourne, Ozzy with Zappa, Dweezil
- Osbournes, The
- Osby, Greg (American jazz saxophonist)
- Osca
- Osca (Zak, Jesse, Joe, Tom - of Wednesbury)
- Oscar (David Hachour & Florent Sabaton; house music)
- Oscar (UK musician Paul Nicholas)
- Oscar (romanian rapper)
- Oscar (early 90s group)
- Oscar (Paul Oscar Beuselinck)
- Oscar + Martin
- Oscar and the Karma
- Oscar and the Wolf
- Oscar Basza
- Oscar Blesson (Norwegian Rapper)
- Oscar de Fontana
- Oscar de la Hoya
- Oscar Emch
- Oscar G. and Falcon, Ralph
- Oscar Hammerstein II and Richard Rodgers
- Oscar Jerome
- Oscar Jerome feat. Akinnibi, Kaidi
- Oscar Jerome ft. La Havas, Lianne
- Oscar les vacances
- Oscar Medina
- Oscar Peterson (Oscar Peterson)
- Oscar the Grouch (Sesame Street muppet)
- Oscar, Alexander
- Oscar, Brad