and PACKING HEAT
Looking tough with his shaved head, Jake Gyllenhaal brought out the big guns to portray a cop on the set of his new flick "End of Watch" in L.A. the other day.
Jake is definitely bulletproof.
Wanna party with Justin Bieber ... you gotta sign on the dotted line! We got our hands on the contract JB makes all his guests sign ... and it seems outrageous and totally douchey -- but maybe it isn't. We'll explain.Plus, Lil Scrappy dodges jail time by claiming he's…