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.

Comedian and presenter Iain Stirling and Californian boy band The Tide join Sam and Mark in the studio to kick off the weekend. The boys take on two Olympians in a 'Face Off' challenge, and who will survive the avalanche in Ball Fall?