- 1 Olly Murs
- 2 OMFG
- 3 Ozzy Osbourne
- 4 Offset
- 5 Ozuna
- 6 Omar Akram
- 7 Odetari
- 8 Otis Redding
- 9 Ozielzinho
- 10 Oliver Scheffner
- 11 Oliver Tree
- 12 OmenXIII
- 13 Ola Gjeilo
- 14 Orjan Nilsen
- 15 Oscar Peterson
- 16 Oliver Heldens
- 17 Ogryzek
- 18 Olly James
- 19 O.T. Genasis
- 20 orb1t
- 21 Oscar Scheller
- 22 Overwerk
- 23 Otto Knows
- 24 Ogün Dalka
- 25 OG PARKER
- 26 Oscar Yuan
- 27 Omarion
- 28 Outertone
- 29 Oxlade
- 30 Orville Peck