Reese Witherspoon: Vince Vaughn is a 'Super Machine Brain'

Watch Oscar-winning actress Reese Witherspoon talk about what it was like to work with Vince Vaughn on "Four Christmases."

Despite rumors of rumbles on the set due to Reese's rather controlled work style and Vince's looser, more spontaneous approach, the actress-producer says she found it a challenge to keep up with his "Super Machine Brain" and admits that she "learned a lot."

Is that a polite way of saying "I absolutely can't stand him?'' Well, let's just see if they ever do another film together.

But from the looks of the "Christmases" trailer, this one really does look hysterical and may be the Christmas comedy to see. If only for the baby barfing all over Little Miss Perfect scene. Or for the Nativity scene with Vaughn in a mini-toga.

Still, if you want to see Reese Witherspoon's hands-down funniest film ever, rent or buy "Election." It's not a Christmas-themed movie, but it's still a gift that keeps on giving.

Video: Sal Morgan