JLS are the most recent celebrities to be inspired by David Walliams' Thames charity swim to 'trunk' (see photo).

Sports Relief, the charity Walliams is swimming for, encouraged the boyband to go 'trunking' in honour of the Little Britain star who hopes to swim 140 miles of the Thames river despite picking up a stomach bug known as 'Thames tummy'. 

Denise Van Outen, Olympic champion Rebecca Adlington and Walliams' wife Lara Stone have also gone 'trunking'. 

The definition of 'trunking' is to act like you're swimming but on dry land. 

Watch the video for JLS's official Children In Need single 'Love You More' below: