Nick Jonas strips to his underwear on Running Wild With Bear Grylls

The episode which aired on Monday night showed the 23-year-old pop star bravely crossing a frozen lake - but not before stripping down to his boxer-briefs.

Nick Jonas Strips Down on 'Running Wild with Bear Grylls' – Watch Now!, Nick Jonas, Television

Bear Grylls & Nick Jonas Tackle The Wilderness And Tread Water In Their Undies. • Instinct Magazine

Nick Jonas Strips Down To His Calvins To Cross Freezing Cold Lake On 'Running Wild' (VIDEO)

Nick Jonas Strips Down on 'Running Wild with Bear Grylls' – Watch Now!, Nick Jonas, Television

Nick Jonas strips to his underwear to cross an ice-cold lake with Bear Grylls

Nick Jonas Strips Down to His Calvins on 'Running Wild With Bear Grylls

Nick Jonas strips to his underwear on Running Wild With Bear Grylls

Sexy Nick Jonas in His Undies for Running Wild w/ Bear Grylls - Videos - Metatube

Watch Nick Jonas and Bear Grylls Swim Across an Ice Cold Lake IN THEIR UNDERWEAR

Nick Jonas Strips Down to His Calvins on 'Running Wild With Bear Grylls

Nick Jonas Strips To Undies on Running Wild With Bear Grylls

Bear Grylls & Nick Jonas Tackle The Wilderness And Tread Water In Their Undies. • Instinct Magazine

Running Wild With Bear Grylls

Nick Jonas strips down (to wade a frozen lake) on 'Running Wild with Bear Grylls