Superstar Rajinikanth is back in the business, thanks to 'Kochadiayan'. A fit Rajinkanth, who is all set to start the shooting has sung a number in the movie too.

Buzz is, that the song written by lyricist Vairamuthu is not been tuned like a full-fledged song that requires a professional singer, but more like a verse type number that has a lot of emphasis on the lyrics.

Rahman is very happy with the output of the song and is thrilled to have recorded with Rajnikanth for the first time. The last time Rajni crooned was for Adikuthu Kuliru in Mannan.