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