Legendary singer Lata Mangeshkar, who last sang for Bollywood in "Salaam-E-Ishq" three years ago, has agreed to sing the title track of Sunjay Sharma's "Dunno Y... Na Jaane Kyun".

When music director Nikhil composed the song, he was in a dilemma whether Mangeshkar, 81, would agree to sing the song. But to everyone's surprise, she readily agreed.

It was almost a dream come true for Kapil Sharma, who is the writer as well as the lead actor of the film. "It makes me believe that if we keep pursuing our dreams, one day they do come true," said Kapil in a statement.