Guest Stars Alan Davies as Himself Gary Barlow as Himself Sheridan Smith as Herself Rob Beckett as Himself Amber Riley as Herself Joe Lycett as Himself Robbie Williams as Himself Sting as Himself OneRepublic as Themselves 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
