Singer Mohit Chauhan, who has sung a song for "Tamasha", says Oscar winning composer A.R. Rahman has lent his Midas touch to the music album of the Ranbir Kapoor and Deepika Padukone starrer.

"I have sung a song in 'Tamasha'. It's a beautiful song and he (Rahman) has created magic in the songs of the film, as he does every time," Mohit said on the sidelines of a song recording for the film "Once Upon A Time In Bihar".

Chauhan, whose first brush with success came with the song "Dooba Dooba" from the band Silk Route's album "Boondein", became the voice of Ranbir's character in "Rockstar", which was helmed by Imtiaz Ali, who's also directing "Tamasha".

Rahman was also the common link in "Rockstar".

But Chauhan says "Rockstar" was a different story.

"It was a narration of a singer's life, so it had to be one voice. But in 'Tamasha', I have only one song. I hope when song of 'Tamasha' will come, audience will like it," he said.