The second set of semi finalists perform live in front of the judges and viewing audience. The judges give their verdict on each act after they have performed. At the end of the show Ant and Dec announce who has the most amount of public votes and has made it through to the final. The judges then decide which of the two acts with the next most amount of votes to put through.
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Ready to Watch Britains Got Talent, Season 3, Episode 9?