Justin Bieber is all grown up, as he often tries to remind us by acting up.
Luckily in this case, it's a musical reminder we're talkin' about, as the Bieb heats up computer screens and phones galore with his "All That Matters" video.
A shirtless Bieber makes out with and grinds on beautiful blonde model Cailin Russo, showing off his abs, dance moves and pelvic thrusting abilities.
The 19-year-old pop star first released the breakup anthem in October, and it's easy to see why it sparked rumors that he's singing about ex Selena Gomez.
Emotionally and physically, the video gets pretty heated. Peep it below: