Watch Paul Potts' rendition of Nessun Dorma at his Britain's Got Talent audition.
Copyright: Britain's Got Talent/ITV/Freemantle Media.
James Corden says he originally thought he'd be able to sing like opera star Paul Potts.
Actor James Cordon plays Britain's Got Talent winner, opera singer Paul Potts in a new film; One Chance. He told Lucrezia Millarini that he asked director David Frankel why he wanted to make the film.