Recurring Guest Characters Rebel Wilson 1 guest appearances Jack Whitehall 1 guest appearances Rob Beckett 1 guest appearances Bastille 1 guest appearances James Arthur 1 guest appearances Sarah Millican 1 guest appearances Olly Murs 1 guest appearances Craig David 1 guest appearances Jamie Oliver 1 guest appearances Michelle Keegan 1 guest appearances John Legend 1 guest appearances Louisa Johnson 1 guest appearances Robbie Williams 1 guest appearances Jamie Redknapp 1 guest appearances Gok Wan 1 guest appearances Amanda Holden 1 guest appearances Honey G 1 guest appearances Lady Gaga 1 guest appearances