Ganesh Acharya launched ‘Bum Bum’ at Varanasi’s Namo Ghat. The song features in his biographical film Ganesh: Dust to Stardust, out December 11. Bollywood choreographer and filmmaker Ganesh Acharya has reiterated his strong connection to Varanasi, recalling his first visit to the city 35 years ago to work on a song.