- O
- OO
- OO
- OOak
- OakObi
- ObiObs
- ObsOce
- OceOct
- OctOdd
- OddOde
- OdeOef
- OehOff
- OffOgd
- OgdOh
- OhOi
- OiOk
- okOku
- OkuOld
- OldOld
- OldOli
- OliOli
- OliOls
- OlsOMB
- OMBOmn
- OmnO
- OnaOne
- OneOne
- OneOng
- OngOno
- OnoOom
- OomOpe
- OpeOpt
- optOra
- OraOrc
- OrcOrd
- OrdOrh
- OrhOri
- OriOrm
- OrmOrq
- OrqOrt
- OrtOsb
- OsbOsi
- OsiOst
- OstOth
- OthOtt
- OttOur
- OurOut
- OutOut
- OutOve
- OveOve
- OveOwe
- OweOxl
- OxlOzm
- OZMOZZ
- Oxley
- Oxmo Puccino
- Oxmo Puccino & Jazzbastards, The
- Oxmo Puccino feat. Booba
- Oxmo Puccino feat. Caballero & JeanJass
- Oxmo Puccino feat. Dany Dan
- Oxmo Puccino feat. Diesel & Dadoo
- Oxmo Puccino feat. Lino
- Oxmo Puccino feat. Slake, Keity
- OXO (early 80s US dance pop group "Whirly Girl")
- Oxo 86
- Oxo 86 feat. André
- Oxo 86 feat. Chris
- Oxo 86 feat. Greg
- Oxo 86 feat. Hans
- Oxo 86 feat. Jussi
- Oxo 86 feat. Ole
- Oxon (Polish rapper)
- Oxtoby (Neil Oxtoby)
- Oxxxymiron (Russian rapper)
- Oxygen (British trance duo)
- Oxygen Destroyer (Seattle Death/Thrash Metal)
- Oxygen feat. Britton, Andrea
- Oxygen Thief
- Oxymoron (German punk rock band)
- Oxymorrons
- Oxys, The (Austin, TX rock band)
- Oy (Swiss/German electro duo Joy Frempong & Marcel Blatti)
- Oya & Bora
- Oyama (band from Iceland)
- Oyatan
- Oyelakin, Tosin
- Oyelana, Tunji
- Oyesono
- Öykü & Berk
- Oyls
- Oyster Murders, The
- Oysterband
- Oysterband feat. Tabor, June & Chumbawamba
- Oysterband featuring Celtas Cortos
- Oysterhead
- OZ (visual kei)
- Oz (Finnish/Swedish metal band)
- Oz One (ska)
- Ozaki, Amii
- Ozaki, Hiroya
- Ozaki, Kiyohiko
- Ozaki, Yutaka
- Ozark Henry (Belgian musician Piet Goddaer)
- Ozark Henry feat. Accoe, Lize
- Ozark Henry feat. Bettens, Sam
- Ozark Henry feat. Elisa
- Ozark Mountain Daredevils, The
- Ozawa, Seiji (conductor and composer)
- Ozbay, John
- Özbeğen, Ferdi
- Özbey, Merve
- Ozbi
- Ozbi, Duru, Gülce
- Ozborne, Etienne & Royal, Benny
- Özcan, Onur Can
- Ozcan, Ummet (Dutch DJ and record producer)
- Ozcan, Ummet, Lownoise, Charly & Mental Theo & Orange INC
- Özçelik, Jülide
- Özdemir, Ercüneyt
- Özdemir, Selahattin
- Özdenses, Semahat
- Özdil, Özlem
- Ozéias de Paula (Brazilian Contemporany Christian Singer)
- Özel, Yaşar
- Ozelle, Sarah
- Özen, Gökhan
- Özen, Sinan
- Özener, Belkıs
- Ozer
- Özer, Zerrin
- Özerk, Tuğba
- Özgün
- Özgür, İbrahim
- Özgürlük Türküsü
- Özhan, Ahmet
- Ozi Batla
- Ozielzinho
- oziem
- Özkan, Cem
- Özkan, Cengiz
- Özkan, Talip
- Özkaynak, Evrim
- Ozma (Californian rock band)
- Ozma (French jazz band)
