Usually in a movie we see an actor replacing his counterpart and same can be said about the actresses too. But ever heard of an actress replacing an actor? And one such actress is Vidya Balan who will now replace Aamir Khan and Abhishek Bachchan as the brand ambassador of Earth Hour 2011. To know more about it, take a look. Visit us at http://www.rajshri.com/Listing/Trailers-and-Trivia/Free-Hindi-Trailers-Trivia-New-Bollywood-Promos-Clips-First. Look for the latest bollywood film reviews makings & trailers.