kperry082811_10_X17230.jpgLooks like Russell Brand and Katy Perry aren't roasting chestnuts together on an open fire this holiday season. The two spent Christmas apart after a "massive fight", according to Us Weekly.

Perry, 27, was originally going to fly her family to London to be with Russell's family, however she reportedly changed her plans ... and decided to spend her vacation in Hawaii.

A source close to the couple tells the mag:

    "They had a massive fight. She was like, 'F**k you. I'm going to do my own thing.' Russell replied, 'Fine, f**k you too.'"

Yikes! Divorce rumors have been swirling since November, however the two superstars have denied they're having problems. The source adds:

    "They haven't split up just yet, but things are not good. The fighting is getting worse."

The twosome tied the knot in October 2010. Could they be heading for a split in 2012? Looks like the ball may drop anytime.