Over the weekend former NFL superstar and Super Bowl champ Keyshawn Johnson took exception to Justin Bieber's driving. According to TMZ Johnson chased down Biebs and confronted him after he felt his reckless driving could "kill someone."

Sources tell us ... Keyshawn had just left a party Sunday night inside of his exclusive gated community in Calabasas (with his child in the car), when Bieber zoomed by in his Ferrari at breakneck speeds.

We're told Keyshawn was furious -- feeling Justin could've killed someone -- so he brought his kid home, then chased after the singer in his Prius (yes, a Prius chasing a Ferrari).

When KJ got to Bieber's pad -- he blocked Justin's Ferrari in the driveway and got out of his car to confront Justin face-to-face ... but Justin ran inside of his house and refused to come out.

Better get your Ferrari drivin' in check Biebs, or next time you got a "Beauty and the Beat" down comin' at you. Keyshawn, who's got nearly a foot and a hundred pound advantage on little Bieber, could change my driving habits quick. I would listen, intently, to any and all of his suggestions -- and we're the same size.