Let's Watch Justin Bieber Rehearse His 'Boyfriend' Moves in Drop Crotch Sweatpants

The video shows Justin getting his groove on before an all-new dance crew, thrusting and grabbing at his unmentionables in a pair of drawstring sweat pants. Yes: Even superstars wear sweat pants.

On Friday, Bieber will perform live at Rockefeller Center on Today. Fans have already been camping out overnight for a spot close to the superstar, despite the fact that they're not allowed to pitch tents in the space. Hopefully New York City Beliebers prove themselves more composed than Oslo's when Justin takes the stage...

Earlier this week, Justin Bieber promised his fans at least one new behind-the-scenes video every day until the June 19 release of his much-anticipated new album, Believe. The pop phenom has, of course, lived up to his word, posting a brief clip of rehearsals for his Around the World Promo Tour.