Nick Jonas strips to his underwear on Running Wild With Bear

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 to His Calvins on 'Running Wild With Bear

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Bear Grylls & Nick Jonas Tackle The Wilderness And Tread Water In

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Nick Jonas strips to his underwear on Running Wild With Bear

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

my new plaid pants: Armie Au Naturel

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

Nick Jonas Strips Down On 'Running Wild With Bear Grylls,' Crosses

Nick Jonas strips down on 'Running Wild with Bear Grylls'