- 1 Olly Murs
- 2 OMFG
- 3 Omar Akram
- 4 Oliver Tree
- 5 Ozzy Osbourne
- 6 Odetari
- 7 Offset
- 8 Ozuna
- 9 OMER DEEP
- 10 One True God
- 11 Oliver Frank
- 12 Omarion
- 13 Omar Apollo
- 14 Omi
- 15 Orjan Nilsen
- 16 Oscar Peterson
- 17 Ogryzek
- 18 Otter Berry
- 19 ok2222
- 20 Otis Redding
- 21 Oliver Scheffner
- 22 OSHI
- 23 Ozielzinho
- 24 Oxlade
- 25 OmenXIII
- 26 Orville Peck
- 27 Oscar Isaac
- 28 Overwerk
- 29 OutaMatic
- 30 Ola