Rachel Bilson -- Bikini Cowgirl Rachel Bilson Bikini Cowgirl 8/23/2010 7:30 AM PT Wearing a cowboy hat and an itsy bitsy, teenie weenie red and black bikini, fomer "O.C." star Rachel Bilson heated up the beach in Hawaii this weekend. Aloha. Share on Facebook Share on X More Hot Bodies Jenny McCarthy Butts Into Sexy Costume Party Rachel Bilson Hot Bodies Beauty Fashion Stars In Heat Paparazzi Photo