The duo kissed in the song for eight hours across three days. The makers are said to have used stop motion technology for the first time in India. The technology which has been used internationally, has been used in the song 'Lip to lip kissiyan', read a statement.

"It's a new technology in India. It was very exciting. The song has shaped up very well. Imran and Kangana both are thorough professionals," the spokesperson of the film said in a statement.

Directed by Nikhil Advani, 'Katti Batti' -- on new age relationships -- starts like a romantic comedy but turns into a thriller with a mystery element and a mature love story. The film will release on September 18.


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