Veteran S.P. Balasubramaniam has sung the title track of forthcoming film "Chennai Express" and Shekhar Ravjiani of the Vishal-Shekhar duo, the track's composers, says the singer is 67 but sounds like a 20-year-old.
"We are big fans (of the singer) since many years. I asked Shah Rukh if we can do this, and he said, 'You can'. So we immediately got in touch with his manager in Chennai," Shekhar said here Wednesday at the music launch of the film.
"He is 67 years old, he has sung more than 37,000 songs and he sounds like a 20-year-old. He is unbelievable, one of the best experiences ever to work with a legend," he added.