- 1 Oceanlab
- 2 Oh Wonder
- 3 OBB
- 4 Origen
- 5 Our Last Night
- 6 O.A.R.
- 7 Orchestra of the Swan
- 8 Oscar Peterson Trio
- 9 Odd Future
- 10 oneBYone
- 11 Otto Le Blanc
- 12 Owls
- 13 Orchester der Deutschen Oper Berlin
- 14 Orbital
- 15 Outloud
- 16 On Fire
- 17 Orchestral Manoeuvres in the Dark
- 18 Okkervil River
- 19 One Nation
- 20 Ours
- 21 One Voice
- 22 Opia
- 23 ON AN ON
- 24 Of Mice & Men
- 25 OZMA
- 26 OneRepublic
- 27 Orchestre Philharmonique de Radio France
- 28 Outlawz
- 29 OK Go
- 30 Onyx