One of professional sports' best rivalries is set to resume this weekend, and it appears two of our favorite celebs are divided as to who they're pulling for. Check out the Red Sox hat on newfound Boston backer Britney Spears (left) and the rival Yankees lid on jackass husband Kevin Federline. Looks like these two are heading for some domestic unrest. Not because of the baseball teams, of course -- just because that's what trailer park couples do on occasion.
These posers aren't really indicative, however. Where do other, non-dysfunctional celebs side in this conflict? On the Beantown side, there's the ever-present Bennifer:
Not to mention Ben's fellow townie, Matt Damon, along with U.S. Senator and former presidential candidate John Kerry: