- O
- OO
- OO
- OOak
- OakObe
- ObeObs
- ObsOce
- Oceoch
- OchOct
- OctOde
- OdeOdo
- OdoOfa
- OfaOff
- OffO
- OOha
- OhaOiz
- OizOKA
- OKAOl
- OlOld
- OldOle
- OleOli
- OliOli
- OliOls
- OlsOma
- OmaOml
- OmmOn
- OnOne
- OneOne
- OneOne
- OneOnl
- OnlOny
- OnyOpe
- OpeOpi
- OpiOra
- OraOrb
- OrbOrc
- OrcOre
- OreOri
- OriOrk
- OrkOro
- OrpOrr
- OrrOrw
- OrwOsb
- OsbOsk
- OskOst
- OstOth
- OthOtt
- OttOur
- OurOut
- OutOut
- OutOva
- OvaOve
- OveOwe
- OweOxb
- Oxe
- OzeOZZ
- OKAWARI, DJ feat. Meyer, Emi
- OKAWARI, DJ feat. San, Woong
- OKAWARI, DJ feat. Styler, Emily
- OKAWARI, DJ feat. Tekitha
- Okay (Marty Anderson's California indie rock project)
- Okay Alright
- Okay Kaya (Kaya Wilkins)
- Okay Mann
- okayceci
- okaywill (will)
- Okazaki, Ritsuko
- Okazaki, Taiiku
- OKDAL
- Okean Elzy
- Okee Dokee Brothers, The
- Okeefe, Josh
- Okehazama, Alisa
- Okehazama, Alisa
- Okello Max
- Oker
- Okereke, Kele
- Okereke, Kele feat. Alexander, Olly
- Okereke, Kele feat. Bailey Rae, Corinne
- Oketo
- Okey Dokey (2010s psych soul)
- Okey, Ixie (Ugandan pop artist)
- okgiorgio (Giorgio Pesenti)
- okho
- OKI (Polish MC)
- Okills
- Okills feat. Guevara, Laura.
- Okilly Dokilly
- Okin (Indonesian musician)
- Okin, Earl
- Okinawa Lifestyle
- Okis (french rap)
- Okkervil River
- Okktli
- Okkultist
- Oklahoma Kid, The
- Oklahoma Kid, The & Consvmer
- Oklahoma Uprising
- Oklou
- Oklou & Casey MQ
- Oklou feat. Bladee
- Oklou feat. Casey MQ
- Oklou feat. Pomme & Harle, Danny L
- Oklou feat. Zero Castigo
- Oklou ft. Bladee
- Oklou ft. underscores
- Okmalumkoolkat
- OKO TYGRA
- Okomfour Kwadee (Kwadee)
- Okon, James
- Okou
- Okoumé
- Okra Playground
- Oksanen, Ritva
- Okta Logue
- Oktae
- Oktet (Oktet Praha)
- Oktobar 1864
- Oktober, Ingeborg
- Oktoberklub
- Oktoplut
- Oktor
- Oku, Hanako
- Okuda, Tamio
- Okudzhava, Bulat
- Okugawa, Hideki
- Okui, Masami
- Okulus
- Okumoto, Ryo
- Okumoto, Ryo (keyboardist)
- Okumu, Dave
- Okupnik, Tatiana
- Okuş, Seha
- Okuto
- Okvsho (Georg & Christoph Kiss)
- Okvsho feat. Sreya
- Okwizi
- Okwudili, Okoli
- OkYm Riim
- Ol Zico
- Ol' Green Spirit, The (Celtic Folk Band From Germany)
- Ol' Skool (R&B Group)
- Ol' Skool feat. Xscape & Sweat, Keith
- Ol’ 55
- Ol’ Burger Beats
- Ol’ Burger Beats feat. Quelle Chris
