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Dermot O'Leary hosts the semi-finals. The four remaining act must perform two songs each, and it will be up to them to really sing their hearts out if they are to be in with a chance of making it to next week's final.
First Air Date : Sep 04, 2004
Last Air date : Dec 02, 2018
Episode : 423 Episode
Season : 15 Season
Runtime: 26:14 minutes
Studio: ITV1
Country: United Kingdom
Crew:
