Selena Gomez throws some serious shade at Justin Bieber.

OHHHHH SNAP, YO!! Selena Gomez has straight burned her ex, Justin Bieber! Or at least we think that's what happened? Either way, The Biebs has had a rough few weeks: First, he went out in a creepy gas mask, then, in the midst of a reported terrible birthday week, JB collapsed backstage during a concert at London's O2 Arena (hope you're feeling better, kid!), THEN he had a super publicized scuffle with some paparazzi. Add a video of Selena Gomez dancing to Dustin Tavella's "Everybody Knows (Douchebag)" to the mix and you've got yourself another horrible, terrible, no good, very bad day to be Justin Bieber. (On the bright side, he's still a family man with abs of steel, so things can't be that bad.)

Watch Selena Gomez and her friends dance to "Everybody Knows (Douchebag)" after the jump.

Selena and a few lady friends hit the dance studio last Saturday to drop it like it's hot to rising Philadelphia singer Dustin Tavella's "Everybody Knows (Douchebag)." As Selena and her posse nail their choreography, they mouth the worlds to Dustin's song: "And everybody knows/ your boyfriend is a douchebag!" Now, it's not like the girls were straight mouthing "JUSTIN BIEBER IS A DOUCHEBAG" (gotta keep it classy!), but suffice it to say we have our suspicions that this dance routine was meant to send a clear message. In fact, it kinda seems like Selena is taking a cue from bestie Taylor Swift and turning to music to vent about her failed relationship. Sure, Sel didn't personally write the song (this isn't Selena's "Dear Justin"), but shaking her butt to it kinda feels like the same thing, amirite?

+ Watch Selena Gomez and her friends dance to "Everybody Knows (Douchebag)."

Photo credit: Selena Gomez Brazil's Youtube