Vaughniston's Award-Winning Chemistry

Though Jennifer Aniston and Vince Vaughn maintain they are not, and never have been, a couple, the two were awarded "Choice Movie Chemistry" for their relationship in the film "The Break-Up."

Appearing to be anything but a couple, the two who just last week denied tabloid reports that they're engaged, took constant jabs at each other during last night's Teen Choice Awards telecast.

Aniston kept cutting Vince off during their acceptance speech, joking "You know what, you probably have enough chemistry for both of us, I'm actually surprised that you're not just nominated for this award all by yourself."

Though it was all in good fun, the two ended the taped speech looking annoyed and with Vaughn saying, "All right -- is this over with?"