Singer IU, T-ara's Jiyeon, and actress Yoo In Na made a surprise transformation into girl group miss A during the March 20th episode of SBS's "Heroes". The 'Heroes' members held a special stage for the 20th Air Force Wing soldiers this day - attracting much public attention. IU, Jiyeon, and Yoo In Na from the 'popular team' presented a cute dance to "Hey, Mickey", which is an OST from the movie "Bring it On". In continuation, after this song, the three members changed their outfits and performed a powerful performance of miss A's "Bad girl Good girl" - drawing huge applause from the soldiers. After the performance, the three members bowed and gave a message of encouragement to the soldiers, and as expected, the soldiers cheered so loud that even the voices on the speakers could not be heard. The members definitely succeeded in lifting the spirits of the soldiers and creating a positive atmosphere at the Air Force base. Check out the clip of their performance below! And other performance cuts. Source: TV Report via Nate