Kristin Cavallari, Stephanie Pratt, and Audrina Patridge led The Hills cast during a beach bikini romp in Costa Rica today. All three of them were sporting some pretty sexy bikinis. All the girls including Stacey the Waitress were out on the sand, and then exploring a near-by waterfall. Tagging along with the group of bikini girls was a shirtless Brody Jenner. They were shooting some scenes for the final episode of the season.

Not with the cast of The Hills was Heidi Montag and Spencer Pratt. The Dynamic Duo, who love some skimpy get ups, have ostracized themselves from the rest of the crew this season. Audrina Patridge, Kristin Cavallari, and Stephanie Pratt have all hosted Las Vegas pool parties so far this Spring season, but now it gets a little more exotic in there Central American shooting location.