Farah Khan's buddies Shah Rukh Khan and Sania Mirza shot for the Diwali special episode of her show, Lip Singh Battle, on Tuesday. The tennis champ battled it out with Sushant Singh Rajput for the crown. As SSR is a fan of King Khan, the star surprised him by making a guest appearance. Sushant was so pleased to see SRK that he could not stop kissing him.