On one team was Justin Bieber and Stranger Things star Caleb McLaughlin.
Naturally, Biebs pulled out some pre-game banter to rile Caleb up, and we're living for it.
In the video, Justin asks Caleb if he plays basketball, and Caleb says he’s been playing most of his life. Bieber then says he doesn't recognise Caleb because he "plays a dorky kid on the show". LOL.
Poor Caleb seems to think that Justin is being serious because he laughs it off saying "I know I know!" but then looks incredibly embarassed.
Both Justin and Caleb joined the Los Angeles Lakers to verse the the Los Angeles Clippers, and you can watch some of the best bits below: