Dr. Palash Sen of famous music band 'Euphoria', who gave us superb songs like 'Dhoom Pichak Dhoom and Maeri', is now coming up with his new song 'Halla Bol' that describes the present condition of commercialism, communalism, and freedom of expression in the country. He feels that films like 'Udta Punjab' and ' PK' type of movies were commercial but the purpose of his song was not so.