The song, by rapper Yo Yo Honey Singh, pays a tribute to Rajinikanth, who is given the title Thalaivar (supreme leader) by his fans.
A source close to the film says, "Obviously if Shah Rukh is giving a tribute to Rajinikanth, due permissions have been taken. We hear that Rajinikanth sir has blessed the song and given a nod to it".
Directed by Rohit Shetty, 'Chennai Express' also features Deepika Padukone. It releases Aug 9.