Chris Brown -- Awesome Surprise Appearance ... Fans Lose It (VIDEO)

Chris Brown was a scream Friday in Vegas.

We're told CB got wind his manager was going to speak with students at a Vegas performing arts center so he decided to tag along.

Chris has had an especially soft spot for kids since discovering daughter Royalty so he went out of his way to inspire them.

Chris will be celebrating the 4th in Vegas with a performance at Drai's Nightclub.