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