Rohit Shetty, who is directing Sharukh Khan starrer Bollywood film Chennai Express with Deepika Padukone playing the female lead, seems to be on the lookout for an top actress to do an item number in the film. The buzz is that, being one of south India's top actress, Nayanthara was approached for it and the actress seems to have refused. The reason behind is unknown, though the grapevine has it that the actress doesn't want to make her Bollywood debut with an item number. Nayanthara is currently busy with a number of Tamil, Telugu and Malayalam films. Her upcoming films in Kollywood are Vishnuvardhan's untitled film, Raja Rani and Idhu Kathir Velan Kadhal. She will also be seen making a special appearance in Dhanush's maiden production Ethir Neechal.