- 1 OneRepublic
- 2 Oasis
- 3 One Direction
- 4 Owl City
- 5 O-Zone
- 6 Oh Wonder
- 7 OK Go
- 8 One Voice
- 9 Oh The Larceny
- 10 One-T And Cool-T
- 11 Our Last Night
- 12 Overground
- 13 Ofenbach
- 14 Origen
- 15 Odesza
- 16 Old 97's
- 17 Otherwise
- 18 Oomloud
- 19 Orchestral Manoeuvres in the Dark
- 20 ONUKA
- 21 Old Gods Of Asgard
- 22 O-Town
- 23 of Montreal
- 24 Oomph!
- 25 Opeth
- 26 Outkast
- 27 Oceanlab
- 28 Of Monsters And Men
- 29 Otros Aires
- 30 Our Lady Peace