- 1 Olly Murs
- 2 Ozzy Osbourne
- 3 OMFG
- 4 Odetari
- 5 Oliver Tree
- 6 Omar Akram
- 7 Offset
- 8 Ozielzinho
- 9 Ozuna
- 10 OsamaSon
- 11 Original Motion Picture Soundtrack
- 12 Ogryzek
- 13 Omar Montes
- 14 Oliver Heldens
- 15 Omi
- 16 Ol' Dirty Bastard
- 17 Omarion
- 18 Oscar Dunbar
- 19 Obie Trice
- 20 Oscar Peterson
- 21 Orlando Dixon
- 22 Otis Redding
- 23 Oscar Isaac
- 24 Omnia
- 25 Orjan Nilsen
- 26 Osunlade
- 27 Oliver Moldan
- 28 Ominus
- 29 Oliver Nelson
- 30 o'landa draper