The ladies of Girl's Day set a fire in the army's hearts when they made a surprise appearance on the latest episode of MBC's army variety program, 'Real Men'!

The army barracks had previously chosen Girl's Day as the most popular girl group on the base. Heeding their wishes, the producers and the cast members unveiled a welcome surprise with the appearance of the four beautiful girls in person!

Amid shrieks and cheers, Girl's Day put on a stirring performance of some of their greatest hits, including "Expectation" and "Twinkle Twinkle".

Check out the full episode below! Girl's Day makes their appearance at 25:30 in the second video.