- O
- OO
- OO
- OO
- OOak
- OakOat
- OatObi
- ObiObs
- ObsOce
- OceOce
- OceOct
- OctOdd
- OddOde
- OdeODM
- OdmOer
- OerOff
- OffOff
- Offogo
- OGROh
- OhOhm
- OHMOja
- OjaOka
- OkaOkt
- OktOla
- OLAOld
- OldOle
- OleOli
- OliOli
- OliOll
- OllOLU
- OluOm
- OmOme
- OmeOmo
- OMOOna
- OOne
- OneOne
- OneOne
- oneOne
- ONFOnl
- Onl
- Oon
- OonOpe
- OpeOpi
- OpiOpu
- OpuOra
- OraOrb
- OrbOrc
- OrcOrd
- OrdOrg
- OrgOri
- OriOri
- OriOrm
- OrmOrp
- OrpOrr
- OrrOrt
- OrtOsb
- OsbOsc
- OscOsl
- Osl
- OstOte
- OTFOtr
- OTROtt
- OttOur
- ourOut
- OutOut
- OutOut
- OutOVE
- OVEove
- OveOVS
- OvtOWI
- OwiOxl
- OxlOzc
- OzcOzu
- Ozuozz
- Oerding, Johannes & Sebastian Krenz
- Oertli, Danny
- Oesch, Melanie & Fischer, Helene
- Oesch’s die Dritten
- OesteSanto
- Oete
- Oettrich, Jens
- of all living things
- Of All Things
- Of All We Cherish
- Of Allies
- Of Blackest Oceans (New Zealand metalcore)
- Of Blessings and Burdens (Amherst, MA post-hardcore band)
- Of Colours (Modern Metal band from Frankfurt/Main, Germany)
- Of Deities and Dust (Doom metal from Dallas, TX)
- Of Eyes That See
- Of Eyes That See feat. Piper, Joel
- Of Fortune & Fame
- Of Gentlemen & Cowards
- Of Good Nature
- Of Gray
- Of Ice (American thrash metal band)
- Of Limbo
- Of Machines
- Of Mice & Men
- Of Modern Architecture
- Of Monsters and Men
- of Montreal
- of Montreal feat. Monáe, Janelle
- of Montreal feat. Solange
- Of New Trolls (New Trolls splinter group; formerly UT New Trolls)
- Of Night And Light (Artist)
- Of Norway & Dale, Linnea
- of persephone (siren-rock band)
- Of Roofs, Genes and Stolen Meanings
- Of Spire & Throne
- Of the Land
- Of the Son
- Of the Trees
- Of the Trees, Crenshaw, Barclay & Strategy
- Of the Vine (US post-rock)
- Of the Wand & the Moon
- Of the Wand & the Moon feat. Howden, Matt
- Of Truth
- Of Two Minds (4-piece math rock band from Columbus, OH)
- Of Us Giants
- of Verona (LA indie rock/electropop group)
- Of Virtue
- Of Virtue feat. Wolfe, Kalie
- Of Vizions
- Of Water
- Of Wolves
- Ofarim, Esther
- Ofarim, Gil
- OFB
- Ofb1t
- Ofdrykkja
- Ofege
- Ofei, Ryan (Ghanaian-Canadian singer)
- Ofelia (Iga Krefft)
- Ofelia K
- Ofeliadorme
- Ofenbach (French DJ duo)
- Ofenbach & FAST BOY
- Ofenbach & Gray, Sam
- Ofenbach & Henderson, Ella
- Ofenbach & ilese, salem
- Ofenbach & Jesso, Justin
- Ofenbach & Lack of Afro feat. Wax & Herbal T
- Ofenbach & Martine, Norma Jean
- Ofenbach & Portugal. The Man
- Ofenbach & Quarterhead
- Ofenbach & Quarterhead feat. Martine, Norma Jean
- Ofenbach & Rehab
- Ofenbach & SVEA
- Ofenbach & Tia Tia
- Ofenbach & Waterhouse, Nick
- Ofenbach feat. Brodie Barclay
- Ofenbach feat. Ingrosso, Benjamin
- Ofenbach feat. J.Lagique
- Ofenbach feat. Martine, Norma Jean
- Ofenbach vs. Waterhouse, Nick
- Ofensivos
- Oferta Especial
- Off (Organisation for Fun, with Sven Väth)
- Off (French-Moroccan rapper)
- Off Bloom (Anglo-Danish 3-piece)
- Off Broadway (American rock band)
- Off by One
- Off Course (Japanese folk band)
