- 1 Oneira
- 2 Owls
- 3 Orchestre Philharmonique de Radio France
- 4 OK Go
- 5 OZMA
- 6 Os Havaianos
- 7 One Last Breath
- 8 Onyx
- 9 One Nation
- 10 Oh Wonder
- 11 Orbital
- 12 ODEN
- 13 OneRepublic
- 14 oneBYone
- 15 Otto Le Blanc
- 16 Orgy
- 17 Our Last Night
- 18 On Fire
- 19 Origen
- 20 Orchestra of the Swan
- 21 Orchester der Deutschen Oper Berlin
- 22 Our Lady Peace
- 23 Otros Aires
- 24 of Montreal
- 25 Odesza
- 26 Old Dominion
- 27 Outloud
- 28 Os Quatro e Meia
- 29 OBB
- 30 Ours