Justin Bieber Flexes, Shows Off His Biceps

Check out the pop star's latest Instagram pic

By Marc Malkin Oct 31, 2012 8:25 PMTags
Justin Bieber, Twit Picinstagr.am

Justin Bieber is showing off his guns.

No, not the shootin' kind.

The 18-year-old pop star took to Instagram last night to post of a photo himself posing a lá Mr. Olympia in a white tank-top undershirt.

Both arms are up, his fists are clenched and his biceps are flexed. Biebs gives some serious face as he stares into the camera.

And, of course, there's bling. There's a gold bracelet on his right wrist and a matching watch on the left. A gold and diamond whistle dangles from a chain around his neck.

Bieber's message accompanying the photo reads, "Jb you think you jacked or sum???"