Mumbai: Filmmaker Karan Johar says the revamped and rejuvenated version of song “Kala chashma” in the film “Baar Baar Dekho” will leave behind “a huge smile on the face and a dance in demeanour”. There is a pattern in Bollywood of unveiling the trailer first, but makers of “Baar Baar Dekho”, which stars Sidharth Malhotra and Katrina Kaif, are taking a different route altogether. Excel Entertainment and Dharma Productions will be presenting the first song from the film even before the trailer releases. The makers got the copyright to the “Kala chashma” song earlier -- and the track will be out on July 27, read a statement. The first glimpse of the song was released in the virtual world on Wednesday. Karan said: “'Kala chashma 2.0' is a party starter and has been the heartbeat of the Punjabi music scene for over a decade... Our revamped and rejuvenated version has enhanced the energy to an altogether different level.” The filmmaker went on to say that the song is in sync with the ethos of the film, which is directed by Nitya Mehra. The film narrates what happens in the life of a person from 18 years to 60. It is slated for release on September 9. Karan added: “'Baar Baar Dekho' is a celebration of life and love, and we thought the song would encapsulate that ethos in the best possible way... It kickstarts our campaign and the trailer will be out soon after... 'Kala Chashma' leaves you with a huge smile on your face and a dance in your demeanour.” The song “Kala Chashma” has been composed and recreated by Badshah, with vocals of Amar Arshi, Badshah and Neha Kakkar. Choreographed by duo Bosco-Caesar, the song is a remake of Amar Arshi's 1990-Punjabi chartbuster "Tennu kala chashma jajta ve". Mehra also shares that “'Kala Chashma' is a celebratory song... It's a fun, foot-tapping, funky number that'll put a swag in everyone's step."