- O
- OO
- OO
- OOak
- OakOb
- ObeOBO
- ObrOce
- OceOch
- Och
- OctODE
- OdeODO
- odoOf
- OfOff
- OffOgr
- OgrOh
- OhaOis
- OisOka
- OkaOku
- OkuOlc
- OldOld
- OldOli
- OliOli
- OliOls
- OlsOma
- OmaOme
- OMFOn
- OnOne
- OneOne
- ONEOne
- oneOnk
- OnkOnT
- OntOor
- OorOpe
- OpeOpu
- OpuOra
- OraOrc
- OrcOrd
- OrdOrh
- OrhOri
- OriOrl
- OrlOrq
- OrqOrt
- OrtOsa
- OsaOsc
- OscOsm
- Osn
- Otr
- OtrOtt
- OttOur
- OurOut
- OutOut
- OutOve
- OveOve
- OveOwe
- OweOxi
- OxiOze
- ozz
- Okuş, Seha
- Okuto
- Okvsho (Georg & Christoph Kiss)
- Okvsho feat. Sreya
- Okwizi
- Okwudili, Okoli
- OkYm Riim
- Ol Wallace
- 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
- Ol’ Dirty Bastard (Wu‐Tang founder, NYC rapper/producer)
- Ol’ Dirty Bastard & Kelis
- Ol’ Dirty Bastard & Wray, Nicole
- Ol’ Dirty Bastard feat. Cappadonna
- Ol’ Dirty Bastard feat. Kelis
- Ol’ Dirty Bastard feat. Kelis
- Ol’ Dirty Bastard feat. Method Man
- Ol’ Dirty Bastard feat. Method Man & Raekwon
- Ol’ Dirty Bastard feat. Method Man and Raekwon
- Ol’ Dirty Bastard feat. Raekwon, Method Man & Gray, Macy
- Ol’ Dirty Bastard feat. Rhymefest
- Ol’ Dirty Bastard feat. Rock, Chris
- Ol’ Dirty Bastard feat. Rock, Chris
- Ol’ Dirty Bastard feat. RZA
- Ol’ Kainry
- Ol’ Kainry & Jango Jack
- Ol’ Kainry feat. Jihane
- Ol’ Kainry feat. Youssoupha
- Ola (Ola Svensson)
- Ola (British)
- Ola & the Janglers
- Ola Podrida
- Ola que quería ser Chau, La
- Ola Runt
- Ola Sweet
- Ola, Andre
- Oladipo, Victor (NBA basketball player performed on The Masked Singer TV show)
- Oladips
- Oladokum, Joy
- Oladokum, Joy ft. McRae, Jensen
- Oladokum, Joy with Penny and Sparrow
- Oladokun, Joy
- Oladokun, Joy & Stapleton, Chris
- Oladokun, Joy & Tim Gent
- Oladokun, Joy feat. McRae, Jensen
- Oladokun, Joy feat. Stapleton, Chris
- Oladokun, Joy ft. McRae, Jensen
- Oladokun, Joy with Manchester Orchestra
- Oladokun, Joy with Morris, Maren
- Oladokun, Joy with Penny and Sparrow
- Olaf
- Olaf & Hans (Folk Pop Party)
- Ólafur Arnalds (Icelandic multi‐instrumentalist and producer)
- Ólafur Arnalds & Dan, Arnór
- Ólafur Arnalds & Frahm, Nils
- Ólafur Arnalds & JFDR
- Ólafur Arnalds & Ott, Alice Sara
- Ólafur Arnalds and Frahm, Nils
- Ólafur Arnalds feat. Dan, Arnór
- Ólafur Arnalds feat. JFDR
- Ólafur Arnalds ft. SOHN
- Ólafur Arnalds ft. Voces8
- Oláh Gergő
- Oláh, Ibolya
- Olaisen, Ylva (Norwegian pop artist)
- Olaisen, Ylva & Brenner, Stig
- Olaiya, Victor (Nigerian trumpeter)
- Olakira (Adefemi Ebenezer, Nigerian producer)
- Olam Ein Sof ("Olam Ein Sof" translates to "World of the Infinites")
- Olamide (Nigerian Hip Hop artist)
- Olamide feat. Phyno
- OLAN (electronic/alternative singer‐songwriter, producer, multi‐instrumentalist)
- Olan, Ray y su Sasón
- Olander, Jeremy
- Olaniran, Tunde
- Olare Utseoritsenere Prosper
- Olari, Silvia
- Olasoji, Wale
- Olathia (Heavy metal band from Cleveland, Ohio)
- Olatuja, Michael (UK electric and acoustic bassist/composer, based in New York)
- Olatunji (alias for Olatunji Yearwood. Trinidadian soca artist.)
- Olatunji, Babatunde
- Olay, Ruth
- Olcay, Zuhal
- Olcay, Zuhal & Onural, Cengiz
