Justin Bieber's back in the studio, and he's got the Instagram video to prove it.

In the new clip, Bieber is seen dancing to a song that sure sounds like it was produced by DJ Mustard -- at one point, you can hear his signature "Mustard on the beat ho!" drop, which also shows up on tracks like Tyga's "Rack City" and 2 Chainz's "I'm Different" -- and, though it's sorta difficult to see (this studio apparently has more black lights than a '70s dorm room), he's definitely feeling it.

A rep for Mustard could not be reached for comment by MTV News at press time. But to expound on his feelings about the new track, Bieber also attached a note to the video: "Girls be in the the club like OMG this is my song!!!!! LOL."

LOL, indeed. In another Instavid, Bieber shouts out producer Soundz, and tells him to get to Toronto, ASAP, since "We're making bangers, bro!"

There's still no word about when fans will get to hear said bangers, though in recent weeks, Bieber has been spending plenty of time in the studio -- just this past weekend, he posted a video of a new song called [article id="1724233"]"Life is Worth Living,"[/article] which many speculated was about his on again, off again, back-on-again [article id="1723880"]relationship with Selena Gomez.[/article]

Last month, Bieber unveiled a new song called [article id="1722791"]"Broken,"[/article] which took aim at the critics that have hounded him since his [article id="1720923"]DUI arrest[/article] in January.