SEE ALSO: Tae Jin Ah releases remix of Rain's 'La Song'

Tae Jin Ah and Girl's Day will perform Tae Jin Ah's song "Ok Kyung Yi" on the upcoming February 13th live broadcast of 'M! Countdown'. They also shared a cheerful proof shot backstage during their rehearsal and pre-recording for their performance.

Catch Tae Jin Ah and Girl's Day's stage in a few hours!