The Lion, The Witch and the Wardrobe (2005) - 'Father Christmas' scene

It's hard to define exactly what makes a piece of music sound festive, aside from when the obvious bells are used. But Harry Gregson-Williams manages, in just a brief flourish.
Starring Georgie Henley, Skandar Keynes, William Moseley, Anna Popplewell, Tilda Swinton, James McAvoy, Jim Broadbent, Liam Neeson, Ray Winstone, Dawn French and Rupert Everett. Co-written and directed by Andrew Adamson, based on the novel by C.S. Lewis. Original score by Harry Gregson-Williams.