Watch the boys on stage with some of the biggest names in pop as we whittle 40 down to 25
Dannii Minogue puts the Let It Shine final 40 boys through their musical paces
Eight of the boys perform with Olly Murs.
Eight of the boys perform with Beverley Knight.
Eight of the boys perform with Busted.
Eight of the boys perform with the Kaiser Chiefs.
Eight of the boys perform with Melanie C.
