Since his new cd “The Darkside” dropped, Bronx rapstar Fat Joe has had some busy days. Midweek he was on the West Coast, telling Chelsea Handler on the “Chelsea Lately” show that the night before he partied long and hard at a cd release event in Washington Heights. Friday he was back in the city doing “RapFix Live” on MTV. And Saturday he was seen smiling and walking out of Covo Restaurant on 135th St. after a late lunch with a couple of members of his entourage. Relax and have a delicious brick oven pizza–you deserve it, Joe!