The 'National Treasure Girls", from MBC "The Greatest Love" revealed a music video for their OST song, "Pit A Pat"! On May 18th, the music video with Gong Hyo Jin, Yoo In Na, Lee Hee Jin, and Bae Seul Gi was released. The four girls are seen in the music video wearing a white dress, a feminine perm, and with cute expressions, making them resemble the old school girl group Fin.K.L. Especially noticeable was Gong Hyo Jin who made slight mistakes in the choreography but still managed to follow along. Lee Hye Jin, who was from a sexy girl group, and cute maknae Yoo In Na also received interest from the fans plus Bae Seul Gi. 'Pit A Pat' is a song by Sunny Hill's Joo Bi and had already received hot interest since the beginning of the drama. On the other hand, Sunny Hill will make a comeback in June. Check out the music video below! Source: OSEN via Nate