Actor Varun Dhawan took his fun-loving on-screen chemistry with Nargis Fakhri a notch higher at a recent event, where he performed an impromptu lap dance for his Main Tera Hero co-star. - See more at: The duo visited Chandigarh last week to promote the film and launched Shanivaar Raati, the third song of the movie, in a college and a mall there. -