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