- 1 Olly Murs
- 2 OMFG
- 3 Ozzy Osbourne
- 4 Oliver Tree
- 5 Offset
- 6 Odetari
- 7 Omar Akram
- 8 Ozielzinho
- 9 Ozuna
- 10 Obadiah Brown-Beach
- 11 Oliver Scheffner
- 12 Ogryzek
- 13 Olivier Deriviere
- 14 Ola
- 15 Ol' Dirty Bastard
- 16 Omah Lay
- 17 Oscar Peterson
- 18 Omarion
- 19 Obie Trice
- 20 Orlando Dixon
- 21 Otis Redding
- 22 Oscar Isaac
- 23 Omnia
- 24 Orjan Nilsen
- 25 Osunlade
- 26 Oliver Moldan
- 27 Ominus
- 28 Oliver Nelson
- 29 o'landa draper
- 30 Obba Babatunde