- 1 Olly Murs
- 2 OMFG
- 3 Oliver Tree
- 4 Ozzy Osbourne
- 5 Offset
- 6 Odetari
- 7 Omar Akram
- 8 Olivier Deriviere
- 9 Ogryzek
- 10 Oliver Scheffner
- 11 Ol' Dirty Bastard
- 12 Omah Lay
- 13 Ozuna
- 14 Ola
- 15 Oscar Peterson
- 16 Ozielzinho
- 17 Obadiah Brown-Beach
- 18 OutaMatic
- 19 Offer Nissim
- 20 Otto Knows
- 21 Omar Apollo
- 22 Omar Rudberg
- 23 Oscar Dunbar
- 24 Omarion
- 25 OLWIK
- 26 Otto A. Totland
- 27 Olly Alexander
- 28 OSZ
- 29 Oddeeo
- 30 Otis Redding