For many, Christmas time is all about cold weather, bundling up, and cuddling by a fire -- but for some stars, the holiday season is the perfect time for stripping down to their bathing suits and showing off their bodies.

And hey, we don't blame them. If we looked this good, we'd be frolicking on the beach, too.

Check out Rihanna and six other stars who partied in their swimsuits this Christmas.