Download "O.K (Instrumental)"
O.K (Instrumental) Lyrics
Lyrics for this song have yet to be released
O.K (Instrumental) Q&A
Who wrote O.K (Instrumental)'s ?
O.K (Instrumental) was written by 서용배 (Seo Yong Bae).
When did B1A4 release O.K (Instrumental)?
B1A4 released O.K (Instrumental) on Thu Apr 21 2011.