Renigunta, the movie starring Johnny with quite a lot of new faces, has Ganesh Raghavendra composing the music. The audio was launched yesterday. The surprise package of the music is the song ‘Thallakulam’, a peppy number sung by none other than Silambarasan. Simbhu is excited about the song and is sure that it would be one of his biggest hits. He had also recently sung a song with Devi Sri Prasad for James Vasanthan in S.P. Charan’s Naanayam.