SEE ALSO: Original Girl's Day member Hwang Ji Sun makes a comeback to the entertainment industry

"Girl's Day's guerrilla concert, which was held in front of the Myeongdong Theater, attracted over 3,000 fans, showcasing their popularity," said DreamT Entertainment. 

Girl's Day went from cute to sexy with performances of their hit songs, "Twinkle Twinkle", "Don't Forget Me", "Expectation", "Oh! My God", and of course, their new title track, "Female President", earning the cheers of fan boys with their new sexy 'nine-tailed fox' choreography.

The girls happily shared, "We were surprised and joyful that more fans than we could have ever expected came out. With a grateful heart, we will continue to show a more humble, passionate, and hard working image."

Girl's Day will also hold a guerrilla concert in Haeundae, Busan on the 29th, and Bupyeong on July 3rd!