- O
- OO
- OO
- OO
- OOAF
- OAFOak
- OakObe
- ObeObo
- OboOca
- OcaOce
- OceOct
- OctOCT
- OctOdd
- OddODE
- ODEOdu
- ODUOf
- ofOff
- OffOfn
- OfoO
- OOh
- ohOhr
- OhrOje
- OjiOka
- OKAOku
- OkuOla
- OlaOld
- OldOle
- OleOli
- OliOli
- OliOll
- OllOls
- OlsOma
- OmaOme
- OmeOmn
- OmnOn
- OnOnd
- OndOne
- OneOne
- Oneone
- ONE
- OniOnn
- OnnOnz
- OnzOoz
- OozOpe
- Ope
- OppOr
- OROra
- OraOrc
- OrcOrc
- OrcOr
- OreOrg
- OrgOri
- OriOri
- OriOrm
- OrmOrp
- OrpOrq
- OrqOrt
- OrtOsa
- OsaOsc
- OscOsk
- OskOST
- OstOTE
- OTEOto
- otoOtt
- OttOua
- OubOur
- OurOut
- OutOut
- OutOut
- OutOve
- Oveove
- oveOwe
- Oweowl
- OwlOxo
- OxoOze
- Ozy
- Ozzozz
- Overall, Kassa feat. Mvula, Laura & Francis and the Lights
- Overbey, Charlie
- Overboard
- Overboard (a cappella group)
- Overcast (US metalcore band)
- Overcharge (trance/acid duo Marc Steinmeier & Olaf Cramer)
- OverClocked Plaid Muffins, The
- 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)
- Overfuzz
- Overground (German boygroup)
- OVERGROUND ACOUSTIC UNDERGROUND
- Overgrown (United kingdom)
- Overhand, Sam
- Overhead (French band)
- Overhead (Finnish progressive rock band)
- Overhook (Alternative Fairymare)
- Overkill (US thrash metal band fronted by Bobby “Blitz” Ellsworth)
- Overlake
- Overland (band featuring Steve Overland)
- Overland, Steve
- Overlanders, The
- Overlife (Progressive Metal, Spain)
- Overload (UK punk band)
- Overload (Pakistani rock band)
- Overload (Swiss thrash metal band)
- Overload feat. Ali, Shafqat Amanat
- Overlord (Chilean melodic thrash/death metal)
- Overlord SR
- 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 & Streets, The
- Overmono feat. St. Panther
- Overmyer, Amanda
- 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)
- Overpower (Bristol UK cross-over thrash band)
- overrated (Hardcore music artist)
- Overrides, The
- Overscene
- Overseer (English DJ/producer)
- Overseer, The (American Christian metal band)
- Overself
- Oversense
- Overshock
- Oversize
- Overslept, The
- Overslept, The feat. Broken Brass Ensemble
- OverSoul (chillout)
- OverSoul feat. Gram’ma Funk
- Overstreet (Alt-Pop-Rock project of Chord Overstreet.)
- Overstreet, Paul (country singer and songwriter)
- Overstreet, Tommy
- Overstreet, Willard
- Overthrone
- Overtime (American hip hop/country)
- Overton
- Overton, Bill
- Overton, Ethan × Coopex × LIANN
- Overton, Karen
- Overtone (South African a capella group)
- Overtones, The (UK founded (from X Factor) vocal harmony group)
- overtonight (alternative artist)
