- 1 Ozzy Osbourne
- 2 Olly Murs
- 3 Odetari
- 4 OMFG
- 5 Original Motion Picture Soundtrack
- 6 Ozielzinho
- 7 Offset
- 8 Omar Akram
- 9 Ogryzek
- 10 Oliver Tree
- 11 OsamaSon
- 12 Oscar Dunbar
- 13 Ozuna
- 14 Omarion
- 15 Ol' Dirty Bastard
- 16 Omi
- 17 Oliver Heldens
- 18 Omar Montes
- 19 Olamide
- 20 Olivier Deriviere
- 21 Offer Nissim
- 22 Omah Lay
- 23 Otto Knows
- 24 Omar Apollo
- 25 OLWIK
- 26 Oscar Yuan
- 27 OutaMatic
- 28 One True God
- 29 Overwerk
- 30 Olly Alexander