In this film, Lip to lip is the third song after Sarfira and Sau aasoon. It is considered as first song in India where stop motion technology has been used. Kangana and Imran kissed each other for 24 hours over a period of three days in order to get a right shot for the song. Explaining the use of special technology in this song, Imran told IANS that: “We have shot Lip to lip using stop motion animation, which is very time intensive because you have to get it right per pose, and they (filmmakers) will take one single frame. When you move a little bit then another frame and it goes on. After they animate it, it looks like smooth motion.
“But it means that you have to hold that position and suppose if there is a phone or a light coming in, then it will happen frame by frame. So all of the kissing moments in this song, we had to start to kiss and they had to take frames one after another as a hundred things would move around us.”
“It was very exhausting. It looks gorgeous, but it’s one of the most physically demanding thing that I have ever done because holding the body in that position static through the day and not moving at all. At the end of every day, we felt like our back was about to break,” he added.