Joe Jonas and Charlotte McKinney Strip Down for Guess Underwear Ads

In case your resolution to hit the gym more in the New Year is already in trouble, Guess is here to get you back on track. Or, rather, Joe Jonas is. The mega brand enlisted the help of the super fit middle Jo-bro for their new underwear ads. (What's the point of working out and depriving yourself of sugar and carbs if you can't show off the results?) Jonas stars alongside model and former Carls Jr. hamburger eater Charlotte McKinney, and if this is giving you some deja vu, that would be because the two just got all sorts of undressed together for the music video for Body Moves, by Jonas' band DNCE (or maybe you remember her from this or this, who know!?). It's like these Jonas kids are allergic to shirts or something — a movement that's become something of a trend these days. Also: the 27-year-old musician seems to have gotten the memo that the GQ-approved way to model with a woman is to wear her as a backpack, so kudos to him. In the meantime, consider this your mid-week thirst trap and/or workout motivation. You're not gonna get that six pack by hoovering some wintertime comfort foods for the next four months. Just ask Joe.