'Confident' singer Justin flexed his muscles in a series of shots as he lifted weights while showing off his growing tattoo collection.
The 20-year-old popstar proudly showed off his torso in the Instagram collage. He said: "Back in the gym #dontbescared #orangegymrats."
The photo sent Justin's legion of fans into a frenzy, as it gained more than one million likes on the social media page!
Aside from working out, Justin has been back in the recording studio working on new music, and it seems like he's got a lot of collaborations in the pipeline.
This week (25 June), he posed for a photo with US rapper Tyga, telling fans that he was "back in the lab".
Also this month (16 June), Justin was pictured in the recording studio with Chris Brown, who was released early from jail. Justin said: "Studio, me and CB - did 1 for the fans." The pair first collaborated on Chris' track 'Next To You' in 2011.
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Watch Justin's video for 'Confident' below: