Mumbai: Megastar Amitabh Bachchan may have sung numerous songs for his films but the legendary actor surprised musical duo Vishal-Shekhar while recording a song for his soon to be released movie Aladin. The song 'O Re Saawariya' is already famous for Bachchan's signature pink pagadi and white kurta from his Namak Halaal days, Vishal said. The song is sung by Sudesh Bhonsle.