- O
- OO
- OO
- OO
- OO
- OOak
- OakObe
- Obl
- OblObs
- ObsOce
- OceOch
- OchOct
- OctOdd
- OddOdd
- OddOde
- OdeODU
- ODUof
- OfOff
- OFFofi
- OFKOgr
- OGROh
- OhOhj
- OHKOin
- OIOOK
- OKOke
- OkfOl
- OlOla
- OlaOld
- OldOle
- OleOlh
- OlhOli
- OliOli
- OliOls
- OlsOma
- OmaOma
- OmaOme
- OmeOmn
- OmnOn
- OnOne
- OneOne
- OneOne
- Oneone
- OneOnk
- OnkOno
- OnoOny
- OnyOos
- OosOp
- OpeOpi
- OpiOpu
- OpuOra
- OraOrb
- OrbOrc
- OrcOrd
- OrdOre
- OreOrh
- OriOri
- OriOrk
- ORKOro
- OroOrq
- OrqOrr
- OrrOrt
- OrtOsa
- Osa
- OscOSK
- OskOss
- Oss
- OtaOth
- OthOtt
- OttOtt
- OttOur
- OurOut
- OutOut
- OutOut
- OutOv
- OvOve
- OveOve
- OveOwe
- OweOwl
- OwlOxm
- OxmOza
- OzaOzo
- OzoOzz
- Ossos Cruzados
- OST (Alternative Rock/Metal)
- Ost & Kjex
- Ost & Meyer with Speed, Ronski & Kanell, Cate
- Ost & Meyer with Speed, Ronski and Kanell, Cate
- Öst, Inger
- Ost, Timmy (Christian music singer)
- Ost+Front
- Ost+Front mit Aicrag, Erk
- Ost+Front mit B. Deutung
- Osta Love
- Ostanek, Walter
- Ostapenko, Eugenijus (Lithuanian singer)
- Ostara (Richard Leviathan’s Australian neofolk/pop rock band project)
- Ostara Project, The
- Ostatnia Klatka
- Ostava (Bulgarian alternative band)
- Ostbahn-Kurti & die Chefpartie
- Ostbahn, Kurt
- Ostbahn, Kurt & Kombo, die
- Ostbahn, Kurt & Ostbahn 11, Die
- Ostblockschlampen
- Osted
- OsTEKKe
- Östen med Resten
- Oster Lapwass
- Oster Lapwass feat. Eddy
- OSTER project
- Osterloh, Dora & Phoenix Love
- Ostermann, Willi
- Ostermann, Willi & Orchester
- österreich
- Ostertag, Florian
- Osterwald, Bibi (actress)
- Osterwald, Hazy (Swiss musician, singer and bandleader)
- Osterwald, Hazy, Sextett
- Ostiaputa (Real band name is without space)
- Ostiaputa
- Ostinato (Jazzband)
- Ostkreutz
- Ostkurve, DJ
- OSTON
- OSTON & Audiotree
- OSTON & JORDY
- OSTON & Sanderson, Lauren
- ostooandell
- Ostoura, Hamo El
- Ostracist (gothic metal band from Greece)
- Ostrar, Adam
- Ostras, Os
- Ostrich Bouquet
- Ostrich Head
- Östro 430
- Ostrogoth (Belgian metal band)
- Ostrowska, Małgorzata
- Ostura (Lebanese heavy/power metal)
- Ostyn (project of Bert Ostyn)
- Ostzonensuppenwürfelmachenkrebs
- Osukaru (Melodic Rock | AOR | Progressive Rock)
- OSUN (South Korean rapper)
- Osunlade
- Osunlade & James, Maiya
- Osunlade feat. Divine Essence
- Osunlade feat. James, Maiya
- Osunlade feat. Oveous Maximus
- Osvajači (Serbian hard rock/heavy metal band)
- Osvaldo (Los Angeles based beatmaker & producer)
- Osvaldo Ayala
- Osvaldorio
- Oswald (German medieval and renaissance group)
- Oswald (a trio, project of Andrea Rottin)
- Oswald (Zouk Singer)
- Oswald (house, techno, pop collective from berlin)
- Oswald & Graf, Esther
- Oswald & Revelle
- Oswald, Marianne (French singer and actress)
- Oswald, Moritz von, Trio
- Oswaldir & Carlos Magrão
- Oswalt, Patton
- Osymyso
- Oszajca, John
- Oszibarack
- OT (Belgian pop singer Olivia Trappeniers)
- OT the Real
- OT the Real, Statik Selektah & Merkules
- OT7 Quanny
- Otaam
- Otai, Mounir
- Ōtaki, Eiichi
- Ōtaki, Yūko (singer)
