Entertainer Jung Joon Ha formed a girl group with actress Kim So Hyun and Girl's Day's member Hyeri.

On December 29, Jung Joon Ha posted on his Instagram, "Girl's Day fans, I'm sorry" along with a picture.

In the picture, Kim So Hyun, Jung Joon Ha, and Hyeri are dressed in Girl's Day's song "Darling" outfits. Jung Joon Ha is dressed cutely in contrast to his big body, giving a shocking visual and bringing laughter to the viewers.

Internet users who saw this commented, "This is shocking," "Girl's Day probably was in shock," and "I enjoyed your stage yesterday."

The three performed "Darling" on "2014 MBC Entertainment Awards" on this day.