Two tickets to Nick Jonas' gun show please!

On Tuesday, the Jonas Bro posted one sexy shirtless "selfie" showing off how his hard work in the gym has paid off.

"I never do this but... Healthy living and fitness update. Post workout picture. #diabeticinshape #2.0," he tweeted along with the shirtless shot.

In November of 2005, Nick was diagnosed with type 1 diabetes -- but before the singer found out he was diabetic he experienced, "the usual symptoms: losing weight, the bad attitude, being thirsty, going to the bathroom all the time," Nick told diabeteshealth.com. He also lost 15 lbs in about three weeks.

We're happy to see that the 20-year-old is taking good care of himself, and we must say looking better than ever! How do you think Nick looks?

Tell toofab in the comment section below, and click "Launch Gallery" above to see more stars' shirtless selfies!

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