- 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
- Osiris (Progressive Rock band from Bahrain)
- Osiris Wolf
- Osiris, YK
- Osiris, YK feat. Kehlani
- Osiris, YK feat. Snoop Dogg
- Osirus Jack (667 crew)
- Oska (Maria Burger, singer-songwriter from vienna)
- Oska (DJ/Producer from Israel)
- Oskar (Ognjen Amidzic)
- Oskar
- Oskar Cyms
- Oskar, Griffin
- Oskar, Karl (Swedish singer-songwriter)
- Oskar, Lee
- Oskee, Tay
- Osker
- Oski (Australian DJ & producer)
- OSKI (Belgian rapper & producer Oscar Santos)
- Oskord
- Oskorri
- Oskr
- Oskura (Cliff Lin & Lucy Martin)
- Oslender, Simon (Keyboardist from Aachen, Germany)
- Oslin, K.T.
- Oslo (lo‐fi beatmaker)
- Oslo Ess
- Oslo Gospel Choir
- Oslo Harmonikvartett
- Oslo Ibrahim
- Oslo Ovnies (Spanish band)
- Oslo Parks
- Oslo Soul Children
- Oslo Tropique (French rock band)
- Osman
- Osman İşmen Project
- Osman Mir
- Osment, Emily
- Osmi putnik
- Osmik
- Osmo
- Osmo's Cosmos
- Osmond Brothers
- Osmond, David
- Osmond, David & Dan Truman
- Osmond, Donny
- Osmond, Donny & Marie
- Osmond, Donny & Wonder, Stevie
- Osmond, Donny & Wright, Laura
- Osmond, Jimmy
- Osmond, Little Jimmy
- Osmond, Marie
- Osmond, Marie & Seals, Dan
- Osmond, Marie feat. Davis, Paul
- Osmonds, The
- Osnes, Laura (singer/actress)
- oso (Rock/Folk/Americana group.)
- Oso Closo
- Oso Leone
- oso oso
- Oso, MarMar
- Oso, MarMar feat. Luh Kel
- Oso, MarMar feat. Teejay3k
- Osoku
- Osola
- Osorio, Ely
- Ospherum
- Ospina, John Paul
- Ospina, Leonel
- Osquello
- OSRSBeatz (James)
- Ossaert (Dutch Black Metal)
- Ossée! (artist from Munich)
- Ossi Duri
- Ossian (Hungarian heavy metal group)
- Ossian (Scottish folk)
- Ossian (Spanish hip-hop)
- Ossicles
- Ossie All Stars
- Ossifar (latin rock group)
- Ossler
- Ossomancer (USA / Black Metal)
- Ost & Kjex
- Ost & Meyer with Speed, Ronski & Kanell, Cate
- Ost & Meyer with Speed, Ronski and Kanell, Cate
- Ost, Timmy (Christian music singer)
- Ost+Front
- Ost+Front mit Aicrag, Erk
- Ost+Front mit B. Deutung
- Osta Love
- Ostava
