Filmmaker Atul Manjrekar, whose upcoming directorial 'Fanney Khan' will feature Aishwarya Rai Bachchan as a singer, has said she used to sing on the film's sets between takes. "I was stunned when I heard her voice for the first time," he added. Talking about Aishwarya's character in the film, Manjrekar further said, "She plays a diva, a singing star."