Jamie Lynn Spears — Knife Wielding Badass … Caught on Security Camera (VIDEO)

EXCLUSIVE

We got the video — Jamie Lynn Spears freaking out with a huge knife as she tries — and succeeds — in breaking up a sandwich shop melee.

TMZ broke the report … Britney Spears‘ lil sis was in the Pita Pit in Hammond, LA last month when a female friend got trapped in the middle of a bunch of guys brawling. Now we…

Chicago Cubs Starlin Castro — My Off-Season Is For Badass Off-Roading

EXCLUSIVE

Starlin Castro is gonna have some seriously filthy fun before baseball starts up again — the Chicago Cubs shortstop just scooped up a new off-road toy, and turned it into a rolling nightclub.

TMZ Sports has learned the 3-time All-Star bought a 2015 Polaris 1000 — a honest all-terrain vehicle — which he pimped out with 4 custom 24-inch waterproof speakers.

The Auto Firm in Miami…