I’m going on a diet.

Nick Jonas ruined the Internet a few weeks ago when pictures of him grabbing his junk for Flaunt magazine surfaced. Once again, the world-wide web faces imminent danger as a new round of snaps, this time for Details mag, find their way online.

Nick says rigorous training and eating healthy helped him beef up for his MMA role on DirecTV series Kingdom.

“I had about six weeks to put on 12 to 15 pounds of muscle before filming started on Kingdom,” Jonas told Details. “My character is a fighter whose strong suits are wrestling and grappling.”

“Diet had a lot to do with it,” the “Jealous” singer said. “I went from consuming about 3,000 calories a day to 4,200… Breakfast was usually an omelet with veggies and cashew cheese, a turkey-meat patty, and some fruit; lunch and dinner would be lean protein, veggies, and nuts; snacks consisted of things like snap peas with peanut sauce.”

“I don’t have the luxury of eating whatever I want whenever I want anyway, because of my type 1 diabetes, so I have been conscientious about food for a long time,” Jonas added. “I do have guilty pleasures, though. I wasn’t drinking at all while I was training for the show, but now that we’re done, I keep it classy with Coors Light.”

Nick says he “got pretty Hulk-ish” during filming.

“I was doing three sessions a day: one fight-training with Kingdom’s coach, Joe ‘Daddy’ Stevenson, and two strength-building with [trainer] Gregg Miele,” the star explained. “Each workout focused on a different region of the body — upper body, core, or legs — and we’d do a circuit of six different moves for one area. Lifting a lot of weights, really trying to break the muscles down.”

Now homeboy cut back to 2,500 calories per day and three or four workouts per week.

“I’m not the kind of person who wakes up in the morning and can’t wait to work out,” he admitted. “I kind of dread it, actually. I see it as a necessary evil.”

See the **** snaps here:
[nggallery id=30]