The naughty and witty karan Johar turns 40 today. Lets take a look at his filmy journey so far, which has left a mark in the industry as well as in the audience's heart. Check it out!! Subscribe now and watch for more of Bollywood Entertainment Videos at http://www.youtube.com/subscription_center?add_user=rajshri. Regular Facebook Updates http://www.facebook.com/RajshriDotCom. Twitter Updates https://twitter.com/#!/RajshriDotCom. Watch more http://www.youtube.com/playlist?list=PL82E2F4C0F81BFADE&feature=view_all for the latest bollywood film reviews, makings & trailer