allkpop previously covered Sulli, Victoria, and Krystal of f(x) posing for their Calvin Klein Jeans photoshoot, but we noticed that considerable interest was being shown in the unique behind-the-scenes video. Donning our reporter's caps, we decided to get more information on it for all of our readers. The behind-the-scenes video was actually a�collaboration�between Calvin Klein Jeans and the creative director, Younyi. The concept revolved around capturing both f(x)'s natural moments and light-hearted play. Through the video, many saw the trio enjoying themselves at the photoshoot with their chic Calvin Klein Jeans padded jackets. The music that plays over the video is performed by the group,�Mad Soul Child, who have previously shown their talent on the OST of the hit movie, "Man From Nowhere". If you missed it before, check out the video and screencaps below!