Following up on her debut track, "Irreversible" earlier (for which she attained an 'all-kill' on online music sites), it was announced that Brown Eyed Girls' Ga-In will be unveiling another solo track. Titled�'Bad Temper', this new song will be released on December 21st. this coming December 21st. As expected from a 'hidden track', very little information was disclosed about it. In truth, 'Bad Temper' was originally prepared for Ga-In's solo album, but due to a delay in the production, the song was inevitably left out. Stay tuned to allkpop for further updates! Source: Newsen via Nate