I'm Playing Game 8!
LeBron James is in good spirits despite missing out on a championship this season ... FaceTiming in to Kai Cenat's stream and cracking jokes about not being in the NBA Finals!!
The hilarious cameo appearance went down as Cenat chopped it up with guests Kevin Hart and Druski on Monday ... when the movie star decided to hit up the Lakers hooper while hundreds of thousands of viewers followed along.
The four-time champ casually dropped the N-word as he greeted the trio .