Demi Lovato and Jimmy Fallon dance to the beats of Kala Chashma; Sidharth Malhotra reacts!

The song Kala Chashma, featuring Sidharth Malhotra and Katrina Kaif from the movie Baar Baar Dekho, was released years ago and has since become a massive hit and a party staple. At every time of day and at any party at night, the song always gets people pumped up and makes them groove. Now, The Tonight Show host Jimmy Fallon and singer Demi Lovato took the Internet by storm after they were seen dancing to the song. Sidharth Malhotra who features in the original song reacted to their video.

On Thursday, Demi Lovato posted a behind-the-scenes video from her appearance on The Tonight Show Starring Jimmy Fallon on her Instagram account. Jimmy first appears in the video at a party with Demi and her punk band as Kaala Chashma is playing in the background.

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He says, "We're celebrating. Break a leg, now! "before really collapsing to the ground. Demi and the band members initially appeared concerned for Jimmy, but as the talk show host began dancing to the upbeat tune, it became clear that everyone was just putting on a show. After the video went viral, Sidharth Malhotra also tweeted, “Hey what fun! Happy to see @jimmyfallon & @ddlovato grooving on #KalaChashma (sunglasses emoji). Thank you for the love.”

In the latest episode of Koffee with Karan 7, Sidharth Malhotra recently made reference to the popular song. The actor disclosed that Katrina, who displayed washboard abs in the video, would only consume ice cubes while the video was being filmed in order to remain "hydrated" and "lean."