Music director Aadesh Shrivastava seems to be fast becoming a Salman Khan favourite and has cajoled him into singing a sentimental number in Ravi Chopra's "Babul".

However, it was producer-director Ravi Chopra who took the initiative and came up with the idea of Salman rendering his voice for the film.

"It is a sensitive father-son number that is to be picturised on Amitji (Amitabh Bachchan) and Salman. Aadesh recorded Amitji's voice for his part earlier and I felt it would be good if Salman croons his part too. He liked the number and did not think twice before giving his nod," Chopra says.

Right now Salman is rehearsing for the song with the music director.

"He is planning to rehearse for the next few days before he gets the right range and modulation in his voice that can match Amitji's range," Chopra said.