LeBron James Gets Over Flu By Raging Onstage With Bad Bunny

Forget NyQuil ... Bad Bunny is apparently the perfect cure for the flu -- 'cause after he brought LeBron James onstage Sunday -- the Lakers star looked magically cured!!!

LBJ has been battling a bad cold this past week ... and he was feeling so crappy over the weekend, he missed L.A.'s game against the Thunder on Saturday.

But, on Sunday, clearly, all the guy needed was some Puerto Rican Latin trap and reggaeton to feel better ... 'cause when Bad Bunny brought him onstage at Calibash at Staples Center, LBJ raged his face off!!

Watch the video ... LeBron sure looks like he's feeling okay to us -- boppin' around and getting the crowd fired up. He even got in a little dance sesh with Bad Bunny himself!!

The Lakers play the Cavs on Monday night ... and based on Bron's performance Sunday -- we're pretty positive he'll make his return to the hardwood for the game.

Sorry, John Beilein.