News is that Katrina Kaif is going to replace Priyanka Chopra in Dostana 2. Director, Tarun Mansukhanai and producer, Karan Johar were forced to change the lead actress as the script of the sequel demanded so. In the first movie, Priyanka lands up with actor, Bobby Deol in the end and her friends John and Abhishek are both heartbroken in the end. In the sequel obviously some romance is in store for the two actors for which they need a new heroine to replace Priyanka. The reason for