Phillip Schofield, Holly Willoughby and Amanda Holden lead a host of stars rallying support for this year's charities - Macmillan Cancer Support, Make-A-Wish UK and Save the Children. Highlights include a visit to Coronation Street with a Text Santa twist, Ninja Warrior receiving the star treatment when a line-up of celebrities take on The Wall, plus Lord Grantham has a tough decision to make in a Downton Abbey special, which even features Michelle Keegan as a flapper! Alesha Dixon, Caroline Flack, Christine Bleakley, Olly Murs, Paddy McGuinness and Stephen Mulhern also feature amid the music, surprises and special guests.