- 1 欧阳菲菲
- 2 OLIVIA
- 3 OoOo
- 4 OSTER project
- 5 OYEON (오연)
- 6 Otomania
- 7 欧若拉
- 8 Osanzi
- 9 OOHYO
- 10 OH!nle
- 11 Oran-G
- 12 Ora
- 13 ONE
- 14 OKI
- 15 Only You
- 16 OVCOCO (오브코코)
- 17 Odd Time
- 18 OHNEW
- 19 onsu
- 20 Obze (오브제)
- 21 OA
- 22 OPENN (오픈)
- 23 onthedal
- 24 Oo
- 25 OUL (오울)
- 26 Okayuka
- 27 Offing (오핑)
- 28 OKEY W
- 29 ocsoosu
- 30 OMOIDE LABEL