- 1 Olly Murs
- 2 OMFG
- 3 Omar Akram
- 4 Oliver Tree
- 5 Offset
- 6 Ozuna
- 7 Ozzy Osbourne
- 8 Ozielzinho
- 9 Orjan Nilsen
- 10 Omah Lay
- 11 Otto A. Totland
- 12 Oscar Peterson
- 13 Olly James
- 14 Ol' Dirty Bastard
- 15 Ottomix
- 16 Oliver Scheffner
- 17 Otto Knows
- 18 One True God
- 19 Omar Apollo
- 20 OutaMatic
- 21 Olivier Deriviere
- 22 Oscar Isaac
- 23 Oddprophet
- 24 Overwerk
- 25 Odetari
- 26 Omar
- 27 Ola Gjeilo
- 28 Oscar Dunbar
- 29 Omarion
- 30 Olamide