New Delhi, January 15 (ANI): After her scorching performance in 'The Dirty Picture', actor Vidya Balan is all set to raise the temperatures. She has again gone goes topless for photographer Dabboo Ratnani's annual calendar. She is seen covered in bubbles in a bathtub, wearing a necklace on her bare neck with dramatic show of her legs. This is not for the first time that Vidya has dared to bare all. She did the same act for Daboo's last year's calendar where she was clicked topless, daubed with white paint, carrying paintbrushes.