- 1 Olly Murs
- 2 Ozzy Osbourne
- 3 OMFG
- 4 Oliver Tree
- 5 Offset
- 6 Odetari
- 7 Oliver Scheffner
- 8 OMER DEEP
- 9 Ola
- 10 Ozuna
- 11 Omi
- 12 Otto A. Totland
- 13 Olly James
- 14 Ozielzinho
- 15 Omar Akram
- 16 Otter Berry
- 17 Olly Alexander
- 18 Ol' Dirty Bastard
- 19 orb1t
- 20 Obadiah Brown-Beach
- 21 Ottomix
- 22 Ole van Dansk
- 23 O.T. Genasis
- 24 Oskar Schuster
- 25 Olivver the Kid
- 26 Oscar Dunbar
- 27 Olamide
- 28 Omah Lay
- 29 Omarion
- 30 OLWIK