Sujoy Ghosh has incorporated a folk song, O Re Saawariya, into his latest film, Aladin. The song is featured on Amitabh Bachchan. But here's the interesting part. Amitabh Bachchan sang the song at a stage show around 20 years ago. Sujoy heard it and kept it in mind.

According to sources, Bachchan came up with a few lines of a song on the spur-of-the moment on a stage show for his fans 20 years ago.

Sujoy had heard it back then and while working on the music of Aladin last year, he spoke to music directors Vishal and Shekhar. He asked them to include the lines in a full song.

When Bachchan heard their song, O Re Saawariya, the song seemed to ring a few bells, but he couldn't remember where he had heard them.

He was in for a pleasant surprise when Sujoy told him that it was his own song and reminded him of the concert that had taken place all those years ago. The song bears resemblance to the numbers of the 1970s and 1980s and is choreographed by Bosco-Ceaser and Saroj Khan.