
"Hangover" star Zach Galifianakis -- who was NOT on a movie set -- hit the streets of Manhattan on Wednesday, dressed to the nines in his finest toilet black tie.
The 39-year-old "fat Jesus" is not only hysterical, he's also kerrrrazy.

Big deal. You come to San Francisco or Berkeley, and you can see people waking around all of the time dressed like that!!!
Britney Spears might miss a lot more 'X Factor' auditions ... because she can! Simon Cowell gave Brit damn near free reign in order to sign the pop star to that $15 million deal -- but is it backfiring? We'll tell you what peeps on the set are saying.Plus, Chris Jericho's…