This is a YouTube clip of an incredible performance by a woman, Susan Boyle, taken from an episode of Britains Got Talent 2009. When she first walks out on stage and is answering questions from the panel there is barely subdued snickering and you could just tell that everyone was expecting her to fall flat on her face - she was being prejudged based on her appearance. Boy, does she prove them wrong.

http://www.youtube.com/watch?v=9lp0IWv8QZY