If you ask anyone about the toughest yoga pose straight comes the answer -- shirshasana. Not only does it look difficult but is also very difficult to achieve especially at the first attempt. To master it you need to practise it daily. Given the health benefits of shirshasana most celebs tend to include this yoga pose in their fitness routine without fail. Here's a list of Bollywood actors performing the yoga pose to perfection. #1. Sonakshi Sinha: It took her weeks to achieve this pose and her progress demonstrates that anything is possible if you try hard enough and practice