The finalists, who will battle it out in this weekend's final for the winning spot, recorded an acoustic rendition of Wizzard's festive hit, 'I Wish It Could Be Christmas Everyday'.
Indulging in a bit of fun ahead of the finals, the three singers filmed a merry video in which they sway along while dressed in festive jumpers.
Luke, 17, dons a green reindeer jumper and reindeer antlers, while Sam goes for a snowflake jumper and red Santa hat. Meanwhile, Nicholas, who returned to Scotland yesterday for his homecoming, wears a red Christmas tree jumper.
The trio all take a verse in the song and are supported by acoustic band, The Chaps. Towards the end, they let loose and show off their creative side as they play musical instruments.
While Sam has been the long-running bookies' favourite to win, Luke, who has often been called the underdog of the competition, told Reveal yesterday that "it's still anyone's game".
£2.49/month – that's all is costs for 4 issues of the REVEAL early edition. Gossip too good to wait for! Subscribe today!
Watch the video below: