Vaughn and Aniston

Vince Vaughn said straight up last week that he and Jennifer are NOT having an affair. Sources on the set of "The Break Up" beg to differ.

"Jen's been raving about Vince's height, his generosity, his mojo- meaning his general swagger and attitude- and especially his sense of humor."

They also say that Aniston "likes the way Vince bends over backward to make her look good." HA! Take that anyway you want. Nope...nothing going on here. Those damn "set people."