Seems like ‘The Dirty Picture’ wasn’t a big enough surprise for her fans who had never ever imagined her in the Ooh La La avatar, as Vidya Balan is now all set to surprise her admirers yet again. If rumours are to be believed, then the actress is all geared up to do an item number in ‘Ferrari ki sawari’ produced by Vidhu Vinod Chopra and directed by Rajesh Mapuskar.