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Nick Jonas recently made headlines when he posted an steamy shirtless selfie to his Instagram account, to (as he explains it) give a "healthy living" update to fans. While stopping by G105 in North Carolina with the rest of his Jo Bros, Nick explained the photo.

Nick says "It's all about healthy living. I had to prep for a role. I shot a movie about two months ago, a lot of the time without my shirt on in the movie. So I carried that over to the summer tour, and continued the healthy living. And I thought I'd give a little progress report."

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Keep up the "healthy living" Nick!

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