WWW- BRITNEY Spears’ marital problems are getting worse. The pop tart and her husband, Kevin Federline, got into a big fight after flying from N.Y.-to-L.A. Federline packed a bag and is staying at the Beverly Hills Hotel. To celebrate her freedom, Spears went out with two girlfriends and the Maloof brothers, who own the Palms Casino/Hotel in Las Vegas. The group went to club LAX, where they danced and partied till the wee hours.

Just two weeks ago, PAGE SIX reported the couple’s brawling over Federline’s profligate spending and perpetual partying. A rep for Spears declined comment.