- O
- OO
- OO
- OOak
- OakObe
- ObeObs
- ObsOce
- OceOct
- OctOdd
- OddODE
- ODEOdu
- ODVOff
- OffOG
- OGOh
- OHOhm
- OhmOjo
- OjoOki
- OkiOla
- OlaOld
- OldOle
- OleOli
- OliOlo
- OloOma
- OmaOme
- OmeON
- ONOne
- OneONE
- ONEOne
- OneOnl
- OnlOnu
- OnwOpa
- OpaOph
- OphOR
- OrOrb
- OrbOrc
- OrcOre
- OreOri
- OriOrk
- OrkOrp
- OrpOrs
- Orsory
- OrzOsc
- OscOsl
- OslOst
- OstOti
- OtiOtt
- OttOur
- OurOut
- OutOut
- OutOve
- OveOve
- OveOwe
- OweOxm
- OXOOzo
- OzoOZZ
- Over, Lary
- Over, Lary & Darell
- Over, Lary & Ñejo
- Over, Lary, Amenazzy & Farruko
- Overall, Kassa
- Overall, Kassa feat. Brown, Danny & Wiki
- Overall, Kassa feat. Croker, Theo
- Overall, Kassa feat. Hakim, Nick & Croker, Theo
- Overall, Kassa feat. Hoard, J.
- Overall, Kassa feat. Lil B, Shabazz Palaces & Francis and the Lights
- Overall, Kassa feat. Mvula, Laura & Francis and the Lights
- Overboard
- Overboard (a cappella group)
- Overcast (US metalcore band)
- Overcoats
- Overcome (American christian hardcore)
- Overdawn
- Overdose (Brazilian metal band)
- Overdose TV
- OverDoz.
- Overdream (metal/rock)
- Overdrive (Swedish metal band)
- Overdrive (NWOBHM band)
- OverDrive Division
- Overdrive Orchestra
- Overdrivers
- Overflash
- Overflow (Croatian punk band)
- Overflow (South Carolina Christian pop/rock band)
- Overground (German boygroup)
- OVERGROUND ACOUSTIC UNDERGROUND
- Overgrown Throne (Chapel Hill, NC punk)
- Overhand, Sam
- Overhead (French band)
- Overhead (Finnish progressive rock band)
- Overkill (US thrash metal band fronted by Bobby “Blitz” Ellsworth)
- Overlake
- Overland (band featuring Steve Overland)
- Overland, Steve
- Overlanders, The
- Overload (Swiss thrash metal band)
- Overlord (Chilean melodic thrash/death metal)
- Overlorde
- Overlords, The (Danish Synth-pop / EBM / electro / techno / goa trance project)
- Overman, Charlie
- Overmars (French metal band)
- Overmaster (Power Metal, Alessandria, Piedmont, Italy)
- Overmono (brothers Tom & Ed Russell (Truss & Tessela))
- Overmono feat. St. Panther
- Overnight
- Overo
- Overpade
- overpade (michael; soundcloud)
- overpade & Ajalaii
- overpade & Morg, Captain
- overpade & Muchi
- overpade & redveil
- overpade & Senju, Lando
- overpade, skaiwater & Nimstarr
- Overpass (successor to California Punk Band 'Slovenly')
- overpass (British band, Birmingham)
- Overrides, The
- Overscene
- Overseer (English DJ/producer)
- Overseer, The (American Christian metal band)
- Overself
- Oversense
- Overshock
- Oversize
- Overslept, The
- OverSoul (chillout)
- OverSoul feat. Gram’ma Funk
- Overstreet (Alt-Pop-Rock project of Chord Overstreet.)
- Overstreet, Chord
- Overstreet, Paul
- Overstreet, Tommy
- Overstreet, Willard
- Overthrone
- Overtime (American hip hop/country)
- Overton, Karen
- Overtones, The (UK founded (from X Factor) vocal harmony group)
- Overtorture (Death Metal from Sweden)
- Overtoun
- Overture (Progressive Metal, Los Angeles, California, United States)
- Overtures (Italian metal band)
- OVERWERK (Canadian DJ)
- OVERWERK feat. MARS
- OVERWERK feat. Nikon, Nick
- Ōverwhelm (Overwhelm)
- Overwhelming Colorfast
