Preity, who is working opposite Shah Rukh Khan in Karan Johar`s Kal Ho Na Ho, was pretty imprssed with the latter`s enthusiasm and endless energy. Since SRK had to wrap up the film, before darting off to London for his back surgery, he worked round the clock.

Preity, being his co-star, was forced to work hard to keep pace with him. She worked almost non-stop for 20 hours for ten days at a stretch, at the end of which she was confined to bed, advised rest by the doctors. Preity, who can`t stop singing praises of the Badshah Khan, however, has decided never again to compete with him!