Day 24: Year 5&6 perform 'Merry Christmas Everyone'

Challenge 1: Who sung this song when it became the Christmas number 1 in the charts?

Challenge 2: In which year did it become the Christmas number 1?

Post your answers here!

Don't forget to come back tomorrow for the Advent Calendar finale - it's a special one!

Also, while you're waiting for the big day, why not track Santa as he delivers his presents around the World.