Alesha Dixon dazzles in a black sequinned gown for the Britain's Got Talent semi-finals

Howie Mandel on Returning to ’America’s Got Talent’ for ‘Amazing’ Season 17 (Exclusive)

Amanda Holden, 51, puts on a leggy display in a thigh-split purple gown at Britain's Got Talent

David Walliams has touching connection with Britain's Got Talent semi-finalist Dante Marvin