Tonight, host Olly Murs welcomes the first four teams of superfans to go head-to-head.Each team experiences the ultimate star makeover as they transform into their icon before stepping onto the stage to sing one of their biggest hits.The star-studded panel featuring Queen frontman Adam Lambert, award-winning actress Sheridan Smith, soul sensation Beverley Knight and comedian Jason Manford decide their favourite team of the night before the voting audience pick just one person to go through to the series final.Plus, there will be a very special performance from Olly and the judges.