- O
- OO
- OO
- OO
- OO
- OOak
- OakObe
- ObeObl
- OblObs
- ObsOce
- OceOch
- OchOCT
- OctOdd
- OddOdd
- OddOde
- OdeODU
- ODUOf
- OfOFF
- Offofi
- OFKOGR
- OGROh
- ohOhj
- OHKOIO
- OiOOK
- OKOkf
- okgOl
- OlOla
- OLAOld
- OldOle
- OleOlh
- OlhOli
- OliOli
- OliOls
- OlsOma
- OmaOma
- OmaOmf
- OMFOmn
- OmnON
- OnOne
- OneOne
- ONEOne
- OneOne
- OneONL
- ONLOno
- OnoOOB
- OOBOoy
- OozOpe
- OpeOpo
- OpoOqu
- OquOra
- OraOrb
- OrbOrc
- OrcOrd
- OrdOrf
- OrfORI
- OriOri
- oriOrl
- OrlOro
- OroOrq
- OrqOrs
- OrsOru
- OruOsb
- OsbOsc
- OscOsl
- OslOst
- Ostota
- OTBOti
- OtiOtt
- OttOTT
- OttOur
- OurOut
- OutOut
- OutOut
- OUTOV
- OvaOve
- OveOVI
- OviOwe
- OweOwl
- OwloXn
- OXO
- Ozz
- Oques Grasses & Doble
- Oques Grasses & Payés, Rita
- Oques Grasses & Santa Salut
- Oques Grasses & Stay Homas
- Oques Grasses, Figa Flawas
- OQueStrada
- OR (rap duo)
- Or Bleu
- Or Bleu featuring Lary Kidd
- Or du Commun, L’ (Belgian hiphop)
- Or du Commun, L’ feat. Elvis, Roméo
- Or du Commun, L’ feat. Elvis, Roméo, Caballero, Zwangere Guy
- Or du Commun, L’ feat. Lous and the Yakuza
- Or Noir (French TV show)
- Or Sobre Blau (Andreu G. Serra [ Ubaldo ] and Kiran Leonard)
- Or-N-More
- Or, Rotem
- Or, Rotem
- Or, The Whale
- OR3O (fandom music producer/vocalist)
- OR3O & Musical Ghost, The
- OR3O feat. Plexsy & Silva Hound
- Ora (Andrew Chalk & Darren Tate)
- Ora (late 1960s UK psychedelia)
- ORA (classical choir)
- ORA (Danish duo)
- Ora Mate
- Ora the Molecule
- Ora, Rita
- Ora, Rita & Limani, Yll
- Ora, Rita feat. Brown, Chris
- Ora, Rita feat. Cardi B, Rexha, Bebe & Charli xcx
- Ora, Rita feat. Cole, J.
- Ora, Rita feat. Fatboy Slim
- Ora, Rita feat. Michaels, Julia
- Ora, Rita feat. will.i.am
- Ora, Rita x Guetta, David x Imanbek
- Ora, Rita x Guetta, David x Imanbek feat. Gunna
- Ora, Rita x Imanbek feat. Khea
- ORA’, ANYMA
- Orachi, Alec
- Oracle (Indonesian Thrash Metal band)
- Oracle (Heavy Metal band from Gibraltar)
- Oracle (Alabama Melodic Death/Black Metal band)
- ORACLE & Fractures
- ORACLE & Holochrome
- Oracle Hands (German Sludge/Post-Metal band)
- Oracle Sisters (Band from Paris, France)
- Oracle Spectre (Deathcore from California)
- Oracles (indie psychedelic rock band from Berlin)
- Oracles (Belgian melodic death metal)
- Oracles feat. Per Nilsson
- Oraculum (US Progressive Metal/Shred band)
- Orage, L (from Italy)
- Orage, L’ (Swiss jazz ensemble from Geneva)
- Orai (Lithuanian post-punk band)
- Orakle
- Oral Bee (Norwegian rapper)
- Oral Bee & Da Playboy Foundation
- Oral Bee & Kholebeatz
- ORAL CIGARETTES, THE
- Oral Tunerz starring Whigfield
- Oral-B (hardcore)
- Oram, Tara
- Orang-Utan
- Orange (California punk band)
- Orange (Dutch trance duo Martijn Cornelissen & Marcel Kaper)
- Orange (German world music/percussion band)
- Orange (Vietnamese singer)
- Orange 9mm
- Orange and Lemons (Filipino pop rock band)
- Orange Animal
- Orange Avenue
- Orange Bicycle
- Orange Blossom
- Orange Blossom (group of voice actresses for Koe de Oshigoto, acting as the characters)
- Orange Blue (German pop duo)
- Orange Blue (Italian dance project)
- Orange Cake Mix
- Orange Caramel (After School sub‐unit)
- Orange Dog Club (Indie Garage Rock project led by Tim Turner)
- orange flavored cigarettes
- Orange Goblin (English heavy metal band)
- Orange Goodness, The (Groove-fueled indie rock)
- Orange Grove
- Orange Guava Passion (Soul/funk pop band based in Providence, Rhode Island.)
- Orange Island
- Orange Juice (Scottish post-punk band from 70s-80s)
- Orange Lights, The
- Orange Ocean (Orange Ocean)
