You've seen in dozens of movies the scene where an unknown emerges timidly from the wings, steps on stage, and -- through dint of sheer talent -- wows the audience into a roaring ovation.

In real life, it doesn't happen much of course. That makes these three minutes on "Britain's Got Talent" so sweet. Mobile phone salesman Paul Potts, 36, from South Wales, makes his debut singing "Nessun Dorma" from "Turandot" and it's so exceptional, even judge Simon Cowell can't stop grinning.

This past Saturday night, he won the whole competition.