Why did Kapil Sharma compare Priyanka Chopra to Amitabh Bachchan?

If he entertains viewers with his perfect comic timing, Kapil Sharma also keeps his guests in good humour when they come on his show Comedy Nights With Kapil. Recently, Priyanka Pinky Chopra appeared on the show, and Kapil floored her by tagging her as lady Amitabh Bachchan of the film featurednews