- 1 ObulKasim-Omar
- 2 OddKid虫牙
- 3 Owsey
- 4 Odense Symfoniorkester
- 5 Oscar Blue
- 6 Oskar Schuster
- 7 oxygen
- 8 Ochoa
- 9 Old Crow Medicine Show
- 10 O MER
- 11 Otis Kane
- 12 Orchestre National Bordeaux Aquitaine
- 13 Ocie Elliott
- 14 Omar Ruiz
- 15 On Prism Records
- 16 ONER岳岳
- 17 Overheat
- 18 Official el de la O
- 19 Orchestre symphonique de Montréal
- 20 OT The Real
- 21 Okay Okay
- 22 Ollie Olsen
- 23 Oleka
- 24 OMO
- 25 Orchid Mantis
- 26 Outertone
- 27 Onigashima
- 28 Ovidio Aguilar
- 29 Orlika
- 30 Ordain