Recurring Guest Characters Tom Grennan 2 guest appearances Adam Lambert 1 guest appearances Joel Corry 1 guest appearances Raye 1 guest appearances Katherine Jenkins 1 guest appearances Cirque du Soleil 1 guest appearances Ella Henderson 1 guest appearances Becky Hill 1 guest appearances Heather Small 1 guest appearances Mark Owen 1 guest appearances Lady Blackbird 1 guest appearances House Gospel Choir 1 guest appearances Kaiser Chiefs 1 guest appearances Steps 1 guest appearances