The pair head south for another K-Fed birthday bash. Plus: Tom & Katie, Paula & her new man and more

GUEST OF HONOR

At the Atlanta nightclub Vision on Saturday, Kevin Federline and wife Britney Spears party like it's his birthday (in fact, he turned 28 on March 21 and celebrated in Las Vegas). The couple stayed at the belated b-day bash for an hour, and left just as the deejay spun Spears's "Toxic."