- 1 Outlawz
- 2 oneBYone
- 3 Orbital
- 4 One Nation
- 5 Oneira
- 6 OZMA
- 7 Order Of The Ebon Hand
- 8 Owls
- 9 ODE
- 10 ODEN
- 11 Orient Fall
- 12 Os Paralamas Do Sucesso
- 13 Orchestre Philharmonique de Radio France
- 14 O.A.R.
- 15 OneRepublic
- 16 Os Havaianos
- 17 Opia
- 18 Origen
- 19 Oh Wonder
- 20 Ours
- 21 Oceanlab
- 22 Opeth
- 23 OK Go
- 24 Oliver Shanti & Friends
- 25 Oesch's die Dritten
- 26 Orchestral Manoeuvres in the Dark
- 27 Our Last Night
- 28 Our Lady Peace
- 29 Opus
- 30 Ofenbach