- 1 Olly Murs
- 2 OMFG
- 3 Oliver Tree
- 4 Ozzy Osbourne
- 5 OMER DEEP
- 6 Omar Akram
- 7 Offset
- 8 Oliver Scheffner
- 9 Omar
- 10 Odetari
- 11 OsamaSon
- 12 Omi
- 13 Owsey
- 14 Omar Apollo
- 15 Orjan Nilsen
- 16 Otto Knows
- 17 Olly James
- 18 Obie Trice
- 19 OmenXIII
- 20 Omarion
- 21 Oscar Peterson
- 22 Orlando Dixon
- 23 Otis Redding
- 24 Oscar Isaac
- 25 Omnia
- 26 Osunlade
- 27 Oliver Moldan
- 28 Ominus
- 29 Oliver Nelson
- 30 o'landa draper