- 1 Olly Murs
- 2 OMFG
- 3 Odetari
- 4 Ozzy Osbourne
- 5 Oliver Tree
- 6 Ozuna
- 7 Otto Knows
- 8 Owsey
- 9 Overwerk
- 10 Oscar Dunbar
- 11 Otto A. Totland
- 12 Oscar Peterson
- 13 Oliver Shanti
- 14 Oliver Scheffner
- 15 Omi
- 16 Omar Apollo
- 17 Oliver Moldan
- 18 Odjbox
- 19 Offer Nissim
- 20 Omah Lay
- 21 Oscar Isaac
- 22 Olivier Deriviere
- 23 OutaMatic
- 24 OmenXIII
- 25 Olly Alexander
- 26 Omar Akram
- 27 Oliver
- 28 Offset
- 29 Onur Betin
- 30 Olamide