IT'S A Wonderful Life has been voted the best Christmas film ever.The classic 1946 Frank Capra movie stars James Stewart as a man who's saved from suicide after he's reminded of all the good he's contributed to the world.It's A Wonderful Life beat off competition from festive favourites The Snowman, in second, and Home Alone, in third.The Muppet Christmas Carol and the 1994 remake of Miracle On 34th Street came fourth and fifth respectively in the poll by British music retailer Hmv.