Yash Chopra's Jab tak Hai Jaan's popular song “Challa” featuring Shahrukh Khan is being loved by his fans but here's a shock to all of those who are grooving to it. Watch the video in high quality 1080p, to know more on the story. Subscribe now and watch for more of Bollywood Entertainment Videos at . Regular Facebook Updates . Twitter Updates . Follow us on google plus: . Get some more dose from . Watch more for the latest bollywood film reviews, makings & trailers.