Sung by Sonu Niigaam and Sunidhi Chauhan, "Jab se mere dil ko uff" is a tribute to Shammi Kapoor who died last year. The star was known for his typcial dancing and singing style.
"The use of the word 'uff' is very Shammi Kapoor. You can almost see his face and his head going back with 'Uff'," Joshi told IANS.
Releasing June 22, the Shahid Kapoor-Priyanka Chopra starrer has been directed by Kunal Kohli, who has taken the couple through different time zones in this love story.
Talking about the inspiration for the song, Prasoon said that it was the situation in the movie that helped him write the lyrics.
"The song required very simple lyrics. My words were inspired by the situation," he added.
Describing "Jab se mere dil ko uff" as a fun song, he said: "It is a very easy song but it has a certain meaning. Meaning does not mean that the song has to be very serious. It's a fun song and I can imagine people singing it. Already people are humming the song."