We saw Aamir Khan posing nude for his film “PK.” Now get ready for an amazing song nanga punga, which is based on Aamir's naked sequence in the film. Music composer Shantanu Moitra says, "Nanga Punga is an amazing, crazy and wild song, crooned by Shreya Ghoshal. It is based on Aamir's nude sequence in the film. It was Rajkumar Hirani's idea to have it." Probe Shantanu if the song was custom-made after witnessing the overwhelming response on Aamir's bare-bodied poster and he reveals, "No it was always a part of the film. The song was not made overnight." He further adds, "All the songs are in synch with the story of the film. The songs of PK are a classic recipe of good singers, fantastic music and lyrics."