Promoting a film has never been more satisfying; at least not for Vidya Balan. The actress who graced Amitabh Bachchan’s quiz show on television on Monday, was see grinning ear to ear on her way out. And that’s not because she had won the prize money. An eyewitness revealed, “Vidya was looking gorgeous in a blood red saree as she stepped in to the sets. It was the same saree she is seen wearing in her film ‘The Dirty Picture’, the film she had come to promote on the show.” Perhaps it was her saree or simply her charm, the host, Amitabh Bachchan’ ended up grooving with Vidya to her ‘Ooh La La’ number from ‘The Dirty Picture’. “It was an impromptu performance. Vidya just told Mr Bachchan ‘Thoda Ooh la la karne ka man kar raha hai’. Bachchan laughed in his inimitable style. He then immediately got up, stretched out his hand and they danced till they could not control their laughter,” added the eyewitness. The episode is expected to be aired on November 10.