29-year-old Swiss glamour model Nena Ristic bared her bum in a skimpy bikini in South Beach on Christmas Eve. The gorgeous brunette wore a shiny striped bathing suit while working on her tan.

Ristic spent her afternoon with soccer player Kevin Prince Boateng, who also showed off his chiseled body in his swimsuit. They were accompanied by another male friend and all seemed to be having a grand time catching rays.

In case you're not too familiar with Ristic, here's some info on the hot gal. She was born in Yugoslavia, raised in Switzerland, and lives and works in Italy. As a result, she knows 5 languages! She can speak English, French, German, Serbian, and Italian!