- O
- OO
- OO
- OO
- OOaf
- OAFOaK
- OakOBE
- ObeObn
- OBOOca
- Oce
- OceOCS
- OCSOct
- OctOdd
- OddODE
- ODEOdo
- OdoOf
- OfOff
- OffOff
- Off
- OgrOh
- OhOhm
- OHMOiz
- OizOka
- OkaOkl
- OklOla
- OlaOld
- OldOld
- OldOle
- OleOli
- OliOli
- OliOls
- OlsOly
- OlyOma
- OmaOme
- OmeOMN
- OmnOna
- OnaOne
- OneOne
- OneOne
- OneOne
- OneOnl
- OnlOnr
- OnrOok
- OokOpe
- OpeOpe
- OpeOps
- OpsOra
- ORAOrb
- OrbOrc
- OrcOrc
- OrcOre
- OreOrg
- OrgOri
- OriOri
- OriOrn
- OrnOrq
- OrqOrr
- OrrOrt
- OrtOsa
- OsaOsc
- OscOsl
- OslOst
- OstOTE
- Oteoto
- OtoOtt
- OttOu
- OuaOur
- OurOut
- OutOut
- OutOut
- OutOve
- OveOve
- OveOwe
- OweOwl
- OwlOxm
- OxmOzc
- OzcOzu
- Ozuozz
- Ottaviani, Giuseppe feat. Schössow, Linnea
- Ottaviani, Giuseppe feat. Seri
- Ottaviani, Giuseppe feat. Shepherd, Amba
- Ottaviani, Giuseppe Feat. Sue McLaren
- Ottaviani, Giuseppe feat. Vitamin B
- Ottaviani, Giuseppe feat. Yates, Clara
- Ottaviani, Giuseppe with Lumiere, Eric
- Ottaviani, Giuseppe, Dyk, van, Paul & Sue McLaren
- Ottaviani, Giuseppe, Rayel, Andrew & Labate, Alessia
- Ottaviani, Giuseppe, Rayel, Andrew feat. Labate, Alessia
- Ottavo Padiglione
- Ottawa (Indie Band)
- Ottawan
- Ottawans
- Otten, Mark
- Otten, Paul (singer/songwriter)
- Otten, Thomas (French countertenor)
- Otter, Anne Sofie von (mezzo-soprano)
- Otter, Anne Sofie von & Costello, Elvis
- Otter, Anne Sofie von & Mehldau, Brad
- Otter, Anne Sofie von, Danielsson, Göran, Rasmussen, Mogens, Henrickson, Leif, Leoson, Markus
- Otter, Anne Sofie von, English Baroque Soloists, Gardiner, John Eliot, Sir
- Otter, Anne Sofie von, Forsberg, Bengt
- Otter, Anne Sofie von, Forsberg, Ulf, Leoson, Markus
- Otter, Anne Sofie von, Musica Antiqua Köln, Goebel, Reinhard
- Otter, Anne Sofie von, Musiciens du Louvre, Les, Minkowski, Marc
- Otter, Till
- Otterloo, Katelijne van (Dutch jazz singer)
- Ottesen, Janove
- Ottewell, Ben
- Ottiki & Charlotte
- Ottiki&Charlotte
- Ottman, John
- Otto (Brazilian singer)
- OTTO (Otto Benson)
- Otto Diva
- Otto Dix
- Otto feat. Gilberto, Bebel
- Otto Knows (SE | electronic)
- Otto Knows & Aris, Alex
- Otto Knows & Scofield, JB
- Otto Knows feat. Avicii
- Otto Knows feat. Stirling, Lindsey & Aris, Alex
- Otto Knows, Dice of Nights & Aris, Alex
- Otto Normal
- Otto Ohm
- Otto, James
- Otto, James feat. Milsap, Ronnie
- Otto, Molly
- Otto, Natalino
- Otto's Daughter
- Ottobre (Italian singer/songwriter)
- Ottobrenero (Italian progressive metal)
- Ottolien (brother duo from Hanover)
- Ottolini, Mauro
- Ottolini, Mauro e la sua Orchestra Ottovolante
- Ottolini, Mauro, Sousaphonix
- Ottolini, Robyn
- Ottoman (Icelandic blues rock band)
- OttoMattic
- Ottone Pesante (Italian band)
- ottori (vocaloid producer)
- OTTTO
- OTTTO feat. Oliveri, Nick
- Ottum, Josh
- Otu (Finnish audio engineer & musician, Moonic Productions)
- otuka
- OTUS (Italian sludge/doom metal band)
- Ótvar Pestis
- Otway, John
- Otway, John & Barrett, Wild Willy
- Otway, John & Barrett, Wild Willy
- otxhello
- Otyg
- Otyken (Siberian aborigine’s music group)
- Otzeki
- Ötzi (Oakland post-punk)
- Ötzi, DJ (Austrian entertainer and schlager singer)
- Ötzi, DJ & Bellamy Brothers, The
- Ötzi, DJ & Friedle, Lisa‐Marie
- Ötzi, DJ & Gott, Karel
- Ötzi, DJ & HBz
- Ötzi, DJ & Hermes House Band
- Ötzi, DJ & P., Nik
- Ötzi, DJ & P., Nik
- Ötzi, DJ & Pircher, Marc
- Ötzi, DJ & Stereoact
- Ötzi, DJ, Pircher, Marc & DJ Herzbeat
- Où est le Swimming Pool (English synthpop group)
- Ou2s (french rapper)
