Will Katrina Kaif keep the promise she made to Ali Zafar?

During the shooting of her film Mere Brother Ki Dulhan (MBKD), Katrina Kaif bonded big time with her co-stars Imran Khan and Ali Zafar. Their off-screen chemistry helped people connect with their characters in the film. We heard that Kat took guitar lessons from pop-star Ali Zafar and boy, she did look convincing as a rock chick! Back then, Kat had promised Ali that she would shake a leg in the music video of his upcoming song, free of cost, if the movie is a hit and now that MBKD has turned out to be a huge hit at the BO, we are waiting to see if Katrina keeps her promise.