Popular Music Director Devi Sri Prasad made Power Star Pawan Kalyan sing a song along with Kota Srinivasa Rao in his upcoming film Gabbar Singh. As mentioned in these coloumns on 6th April, the Audio Launch of Gabbar Singh will be held on 15th April 2012, at a glittering function at Hyderabad. Let us wait till 15th April to listen to Pawan Kalyan voice as singer.