Ant and Dec host the first semi-final of this year's contest,with the audition process having left judges Amanda Holden,David Walliams, Simon Cowell and Alesha Dixon with 40 acts topick from. Tonight, eight of them will be performing live inthe hope of impressing both the panel and the TV audience towin one of the two spots in the live grand final, where thewinning act will receive a life-changing £250,000 prize and aspot at this year's Royal Variety Performance at the LondonPalladium Theatre in November.
