In the first of a new series, Sam Nixon and Mark Rhodes host a festive special. Union J perform their single You've Got It All, while the Vamps go undercover. Show more

Sam and Mark are joined by Jedward and pop star Harvey, and Union J go to a fan's house to give her the surprise of her life. Show more

Sam Nixon and Mark Rhodes get the weekend party started with special guests Rough Copy, and Cel Spellman surprises his number one fan. Show more

Hosts Sam Nixon and Mark Rhodes are joined in the studio by country music stars Ward Thomas, and Countdown's Rachel Riley pops in to set a special challenge. Show more

Boy band Overload Generation join Sam and Mark in the studio to perform their first single. Also, Ed Petrie drops in to give a Wind-Up fan the surprise of her life. Show more

Sam and Mark take their box of disguises to York to play a game of In Yer Face, and an embarrassing dad dresses up as Taylor Swift. Show more

Sam and Mark look back at some of their favourite hidden camera pranks, including wind-ups from One Direction, Jessie J and Union J. Show more

Sam and Mark are back to get the weekend party started with a special performance from pop sensation Magalie. Show more

In this final show, Sam and Mark look back at some of their favourite moments and funniest celebrity wind-ups from the past four series. Show more

Sam and Mark look back at some of their favourite wind-ups and celebrity guests from the fourth series, including Union J, the Vamps and Jedward. Show more

Bars and Melody join the Wind-Up team to surprise two fans and perform one of their tracks. Internet sensation Zoella helps two fashion-mad fans win prizes. Show more