Guest Stars Sheridan Smith as Herself Alan Davies as Himself Rob Beckett as Himself Joe Lycett as Himself Robbie Williams as Himself Sting as Himself Gary Barlow as Himself OneRepublic as Themselves Amber Riley as Herself Barry Gibb as Himself ABC as Themselves DNCE as Themselves Tom Fletcher as Himself Diversity as Themselves Emeli Sandé as Herself Richard Jones as Himself Cirque du Soleil as Themselves