- 1 Olly Murs
- 2 OMFG
- 3 Offset
- 4 Ozzy Osbourne
- 5 Oliver Tree
- 6 Odetari
- 7 Omar Akram
- 8 OMER DEEP
- 9 Obadiah Brown-Beach
- 10 Ozuna
- 11 Oliver Scheffner
- 12 Omar
- 13 Omah Lay
- 14 Otto Knows
- 15 Omar Rudberg
- 16 Oscar Peterson
- 17 OTR
- 18 orb1t
- 19 OutaMatic
- 20 OmenXIII
- 21 Omarion
- 22 Obie Trice
- 23 Orlando Dixon
- 24 Otis Redding
- 25 Oscar Isaac
- 26 Omnia
- 27 Orjan Nilsen
- 28 Osunlade
- 29 Oliver Moldan
- 30 Ominus