Kamal has sung a song for the maestro Ilayaraja for the Hindi film Happi.
Ilayaraja was not happy with the original singers voice and he thought Kamal would be apt for it.
Ilaiyaraaja immediately called up the actor and requested him to rush to the studio to sing the difficult number written by Jaideep Sahini.
Kamal Haasan keeping everything aside rushed to Ilayaraja studio and recorded it in half an hour!
Kamal Haasan later said his respect for certain people go beyond the work place.