- 1 Olly Murs
- 2 OMFG
- 3 Owen
- 4 Ozzy Osbourne
- 5 Offset
- 6 Oliver Tree
- 7 Omar Akram
- 8 Ozuna
- 9 Otto Knows
- 10 Ozielzinho
- 11 Obadiah Brown-Beach
- 12 Omarion
- 13 Odetari
- 14 Oliver Scheffner
- 15 Oscar Peterson
- 16 Otis Redding
- 17 Ol' Dirty Bastard
- 18 oliver koletzki
- 19 O.T. Genasis
- 20 Otto A. Totland
- 21 Olly James
- 22 Omah Lay
- 23 OutaMatic
- 24 ODK Beats
- 25 Omar Apollo
- 26 Obie Trice
- 27 Orlando Dixon
- 28 Oscar Isaac
- 29 Omnia
- 30 Orjan Nilsen