Rapper Yo Yo Honey Singh is all set to lend his voice to superstar Ranbir Kapoor in the actor's upcoming film 'Roy'. Honey Singh has already lent his voice to superstars such as Sunny Leone, Shahrukh Khan, Amitabh Bachchan and Deepika Padukone. Let's wait and watch for his collaboation with the 'Rockstar' actor!  Show less