While the thought of Piers 'dropping trou' isn’t really the kind of footage we’d encourage people to share, we’re actually quite pleased the hilarious prank was caught on camera, with a Vine video of the incident doing the rounds online.
In the short clip, Piers is shown on the sidelines when Harry appears from nowhere, and pulls down the former ‘Britain’s Got Talent’ judge’s shorts, before running off and giving a celebratory fistpump to the camera.
Luckily it seemed that Piers saw the funny side, and even tweeted a clip of him being ‘pantsed’, joking: “Debagged by @harry_styles - can’t work out if this is a career high or low?”
Other members of his team included fellow 1D singers Liam Payne and Louis Tomlinson - who plays professionally of Doncaster reserves - as well as pop star Olly Murs and comedians Jack Whitehall and James Corden, who wrote the dialogue for the boyband’s ‘Best Song Ever’ music video.
Meanwhile their competitors, who ultimately won the game after it went to a penalty shoot-out, starred former professional footballers Robbie Savage and Boyzone singer Keith Duffy.
The boyband are currently back in the UK after spending time in South America as part of their massively successful ‘Where We Are’ tour, which is now making its way across stadiums around the country, culminating with three gigs at Wembley Stadium at the beginning of next month.