- O
- OO
- OO
- OO
- OO
- OOak
- OakObe
- ObeObl
- OblOC
- OCOce
- OceOck
- OckOct
- OctOdd
- OddOde
- OdeODO
- odoOer
- OerOff
- OffOff
- OffOgi
- OgiOh
- OhOhh
- OhiOin
- OinOK
- OKokg
- okgOl
- OlOLB
- OlcOld
- OldOle
- OleOli
- OliOli
- OliOll
- OllOls
- OlsOma
- OmaOMC
- OmdOmi
- Omkon
- OnOnc
- OncOne
- OneOne
- OneOne
- OneOnh
- ONIOnl
- onl
- Oon
- OONOpe
- OpeOph
- OphOpt
- OptOra
- OraOrb
- ORBOrc
- OrcOrc
- OrcOre
- OreOrg
- OrgOri
- OriOri
- Oriorm
- OrnOrp
- OrpOrq
- OrqOrt
- OrtOsa
- OsaOsc
- OscOsk
- oskOss
- OssOT
- OtaOth
- Othott
- OTTOtt
- OttOur
- OurOut
- OutOut
- OutOut
- OutOva
- OvaOve
- OveOvi
- OviOwe
- OweOx
- OXOyi
- Ozi
- oziOZZ
- Ollie Joseph
- Ollie Joseph & Apollo
- Ollie MN
- Ollie, Peppermint
- Ollivierre, Dylan
- OlllO
- Ollmann, Kurt (baritone)
- Ollo, Lóstrego!
- Olltii
- Olly (Italian singer/rapper Federico Olivieri)
- Olly & Arisa
- Olly & JVLI
- Olly & JVLI
- Olly Anna
- Olly Junglist (Electronic/D&B producer, features on Rhythmic Remedies)
- Olly Molly
- Olly, Mango, Angelina & JVLI
- Olma (ambient guitar)
- Olma feat. Grigoni, Mike
- Olmeca
- Olmerová, Eva
- Ölmez, Orhan
- Olmos
- Olmos & Ellis, Richard
- Olmos & OZNE
- Olmos feat. Reynolds, Kyle
- Olmos, Walter
- OLMS
- Olms, The
- Olney, David
- OLNL (korean rapper)
- Olodum
- Olof Wallberg
- Olomana
- Olomidé, Koffi
- Olomidé, Koffi & Quartier Latin
- Olomidé, Koffi feat. Gawlo, Coumba
- Olotila
- Olovson
- Olrait's, The
- Olrog, Ulf Peder
- Ols (one-woman project from Poland)
- Olsein
- Olsen & Fu
- Olsen Brothers
- Olsen, Alek
- Olsen, Allan (Danish folkrock musician)
- Olsen, Angel
- Olsen, Angel & Simpson, Sturgill
- Olsen, Dorothy
- Olsen, Egil
- Olsen, Egil S.
- Olsen, George, and His Music
- Olsen, Jon Flemming
- Olsen, Jørgen
- Olsen, Kristina
- Olsen, Lenay
- Olsen, Lynn (Dutch artist)
- Olsen, Troy
- Olsenbanden jr.
- Olsey, Sepp
- Olson (German rapper)
- Olson, Alix
- Olson, Carla
- Olson, Carla & Clark, Gene
- Olson, Carla & Taylor, Mick
- Olson, Danny
- Olson, Danny & Frank, David
- Olson, Danny & Krueger, Becca
- Olson, Danny & Linney
- Olson, Danny & Luma
- Olson, Danny & yetep feat. Easae
- Olson, Danny, Krueger, Becca & Everen Maxwell
- Olson, Evan
- Olson, Gary (Brooklyn vocalist/guitarist for Ladybug Transistor)
- Olson, Hans
- Olson, Jill
- Olson, Jules (singer-songwriter)
- Olson, Luke
- Olson, Mark (US alt. country musician, Jayhawks etc)
- Olson, Mark & Creekdippers, The
- Olson, Mark & Louris, Gary
- Olson, Mark & The Creekdippers
- Olson, Mark and the Original Harmony Ridge Creekdippers
- Olson, Michael (US christian singer, songwriter & drummer)
- Olson, Mika
- Olson, Olivia (American actress, singer-songwriter)
- Olsson (key track “Hold On”)
- Olsson feat. Mapei
- Olsson Ingemar
