Nick Jonas went shirtless on Twitter and Instagram, showing off his toned body in a viral selfie on Tuesday.

The 20-year-old Jonas Brother took to Instagram to post a picture flaunting his fit chest. He captioned the image, "I never do this but...Healthy living and fitness update. Post workout picture. #diabeticinshape #2.0."

His "buff biceps, perfect pecs and toned abs" added up to one "ridiculously ripped" body, reported E! Online.

The image of Jonas basking in his bare chest glory and Nike workout shorts has already garnered 191,000 likes in 22 hours. It is very clear from the "First Time" singer's stance that he is very confident and happy with his new physique.

In fact, Jonas lifts one arm behind his head to flaunt his taunt upper torso for Instagrammers.

The youngest JoBro lives a very healthy lifestyle after being diagnosed with Type 1 Diabetes at age 13, according to USA Today.

He told Diabetes Health that it was quite a time dealing with the disease, "For someone who had no bad medical history ever, to suddenly have the shock of Diabetes was a bit overwhelming in itself."

"And then I had to learn all about it," he continued. "Learn all these things in such a short period of time. All of it was crazy. I also wondered if I could continue making music...but I had the support of my friends and the band to be there with me."

Currently, Jonas is with brothers Joe and Kevin to play a concert at the Red Hat Ampitheatre in Raleigh, North Carolina on Wednesday night.

He tweeted early Wednesday, "Back in NC very nostaglic. @CWYWF wrapped two months ago already! Who's ready for the show tonight?

What do you think of Jonas's selfie? Tell us in the comments section below!