A festive episode, packed with Christmas surprises. Imperial stormtroopers from the latest Star Wars movie invade the studio to surprise a fan. The audience take on an extremely soggy singing challenge in Karasnowke, embarrassing parents are banished to the School of Shame and two families go head to head in the ultimate final challenge Ball Fall. The Vamps play their latest hit in the studio.

Tom Fletcher joins Sam and Mark in the studio to kick off the 2017 series. There's the world's wettest singing contest 'Karasoake', punishment for embarrassing parents at the 'School of Shame' and chart-toppers Ward Thomas perform in the studio.

Stars of The Dumping Ground surprise two of their superfans. Sam and Mark go undercover in In Yer House Extreme and there's music from boy band Union J.