We spotted Rihanna partying on a yacht in Saint Tropez over the weekend. The pop star hung out with some friends, had a few beers and played around on a jet ski.

The Bajan beauty wore a black, white and magenta strink bikini and tied her hair up in braids.

"Dancing With The Stars" celeb Karina Smirnoff also had fun in the sun over the weekend. We spotted the professional dancer paddleboarding in Miami.

Karina showed off her great abs in short athletic shorts and a bikini top.

See more photos of Rihanna and Karina...