Trama
Britain has been voting over the last 24 hours and now the semi-finalists find out the result of the public vote. The act with the fewest votes will leave the competition, and the others will compete in next week's final. Including live performances from the cast of hit US series Glee, former X Factor winner Alexandra Burke and chart-topping group the Black Eyed Peas. Hosted by Dermot O'Leary.