- O.S.O. 507
- Olivier Martelly
- Oskar Häggström
- Oh!Sharels
- Once Ibex
- 殴康德
- O.B.F.C
- Original Cast of Aristos: The Musical
- Oliver Buckland
- Onsen Music Retro
- Osman Yurdal Tekcan
- Odus Maggard
- Ottobrenero
- OBS Taz
- Ove Engström
- Ookami
- outset island
- Ouraa
- OldThief
- Open Quartet
- Old American Junk
- Orquesta Inmensidad
- Official_dtrav2x
- OlivierDaySoul
- Officina Madre
- Orchestra Giovanile Russa
- Oddysee
- Oscar Cáceres
- 哦国服
- Otto Dobrindt Piano Symphonists
- Odd Collective
- ok cyphe
- Opulsif
- Ov Sulfur
- Odd Wall
- OLN
- Orchestra Nova
- Of the Atlas
- Orkortor Perry
- Olivia Hazel
- Ofili
- Orange Dolla Fox
- Oiki
- Oddits
- Oxlo
- Orchestra Linda Biscaro
- orgetplus
- Ontspanning Meditations
- One Man Pianoforte
- OnPhire
- Orquesta De La Agrupacion Cancion Española Joaquin Jurado
- Odubanj
- Oliver Twizt
- Optimistic Jerry Sax
- O’Flynn
- Ocean Noises
- Okten
- Odd Vision
- Orquesta La 33
- Othman Mayor
- OmgKeon
- Oslo Noire
- Ordinarius
- OKFINE
- OLDSPORT
- Olive Is the Sun
- On The Cinder
- Out Trax
- Orio Odori
- 藕片挖洞专业户
- onlyaboy
- Odvlion
- OTOKA
- Oscar Oscar
- Opone
- OddBall Iraq
- Orquesta Severino Ramos
- Official JR
- O.Left
- One Last Word
- OLEDICKFOGGY
- Owen Nathanael
- Olaminiranz
- Orkiestra z Chmielnej
- OBLVN
- oxhead
- Oliver N'Goma
- OEO Klan
- Ochoa B Redd
- Old Fat
