- 1 Olly Murs
- 2 Ozzy Osbourne
- 3 Owen
- 4 OMFG
- 5 Omar Akram
- 6 Oliver Tree
- 7 Offset
- 8 Odetari
- 9 Ogryzek
- 10 Omar
- 11 ONR
- 12 Ozuna
- 13 One True God
- 14 OMER DEEP
- 15 Omar Rudberg
- 16 Ozielzinho
- 17 Omi
- 18 Offer Nissim
- 19 Oliver Scheffner
- 20 Owsey
- 21 Otter Berry
- 22 Oscar Yuan
- 23 Obie Trice
- 24 Oliver Frank
- 25 Otis Redding
- 26 Omarion
- 27 Oscar Peterson
- 28 Orlando Dixon
- 29 Oscar Isaac
- 30 Omnia