Despite a rainy day in San Francisco, Reese Witherspoon and Vince Vaughn had no problem playing smitten while filming their upcoming movie Four Christmases yesterday. While I can't believe they were only a few blocks away, at least someone from Sugar HQ got a good celebrity sighting out of it. Check out his story here — he even made it into the background of a paparazzi shot! Hilarious. Vince's Christmas movie this year was a bit of a dud, but I'm already excited for next year's. Plus, fingers crossed that having Reese up in SF will lure up Jake for even more local sightings of your Favorite New Couple of 2007.

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