- 1 Olly Murs
- 2 OMFG
- 3 Oliver Tree
- 4 Ozzy Osbourne
- 5 Offset
- 6 Omar Akram
- 7 Odetari
- 8 Ozuna
- 9 OMER DEEP
- 10 Ogryzek
- 11 Omi
- 12 Omar Apollo
- 13 Omarion
- 14 One True God
- 15 Oliver Frank
- 16 Oscar Peterson
- 17 Orjan Nilsen
- 18 Obie Trice
- 19 Orlando Dixon
- 20 Otis Redding
- 21 Oscar Isaac
- 22 Omnia
- 23 Osunlade
- 24 Oliver Moldan
- 25 Ominus
- 26 Oliver Nelson
- 27 o'landa draper
- 28 Obba Babatunde
- 29 Ol' Dirty Bastard
- 30 Olaf Berger