Leon Jackson's song When You Believe beat What a Wonderful World by Eva Cassidy and Katie Melua who took second place.
276,000 copies of When You Believe by Leon Jackson were sold, and this was the highest weekly total for any track released this year and five times as many as the song by Katie Melua and the late Eva Cassidy.
Leon Jackson was reported to have said proudly: "It's been a great ending to a fantastic year and it's just the best Christmas present I could ever wish for."
When You Believe had originally been a top five hit for Mariah Carey and Whitney Houston in 1998, but it was rewritten for X Factor winner Leon Jackson.
