The "Boyfriend" crooner doffed his shirt for a revealing pic that he proudly posted on Twitter, showing off the results of his workout regimen.
"Back in the gym," he tweeted Friday, dropping his overalls to reveal his cut torso, boxer briefs and signature tats.
Biebs' gym trip seemed to have gone well, because he later wrote, "good workout. #focused."
He certainly had reason to stay focused: It was an eventful weekend in Bieber Land over the weekend.
On Friday, he met with Canadian Prime Minister Stephen Harper to receive the Diamond Jubilee Medal on behalf of Queen Elizabeth II, which recognized Canadians' "significant contributions and achievements."
His choice of attire, however, raised more than a few eyebrows after Biebs showed up in overalls, a plain white shirt and a baseball cap. Talk about keeping it real!
And then on Sunday, the 18-year-old appeared in a sit-down interview with Oprah Winfrey that was taped before he and Gomez split up. In it, the Biebs swooned openly about his ladylove, singling out her "genuine" spirit.
"She's one of the most genuine people," the crooner shared. "She just has a good heart."
He also added, "I can talk to her about everything."
Looks like the two are at least trying to talk things out these days: They've been spotted together several times since E! News exclusively reported that that two had called it quits, hitting up an American Music Awards after-party and then, a few days later, grabbing dinner with friends at a Japanese restaurant in Los Angeles.