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.

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

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

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

Nick Jonas Just Jared: Celebrity Gossip and Breaking Entertainment News, Page 125

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

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

Nick Jonas in His Underwear With Bear Grylls

Watch Nick Jonas Strip Down to His Underwear on 'Running Wild with

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

Nick Jonas strips to his underwear on Running Wild With Bear

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

Nick Jonas Strips To Underwear For Ice-Cold Dip With Bear Grylls

Attitude March 2017 (Digital)

Nick Jonas Strips Down on 'Running Wild with Bear Grylls' – Watch

Nick Jonas Strips Down on 'Running Wild with Bear Grylls' – Watch