Kareena Kapoor has not stopped smiling ever since she was publicly appreciated by Shah Rukh Khan on Twitter. Impressed with her level of commitment towards the film Ra. One, Shah Rukh Khan recently praised Kareena on the micro blogging site. SRK tweeted: "Finished the last few bits of Ra. One with Kareena. Want to thank her for working so hard and fast  she was such a sport." "Kareena was born to act. She is a natural; she has no craft, grammar or process attached to her acting. She is gifted with a great sense of cinema that I have seen only in Kajol other than her. Move her from the sets of Golmaal to a Jab We Met to a Chameli on the same day, and Bebo will fit into them all," says director Karan Johar.