Rachel Bilson: Bikini Cowgirl

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.Rachel Bilson: Bikini CowgirlRachel Bilson spent her weekend in Hawaii, where she hit the beach yesterday in a range of different bikinis. Rachel Bilson showing her amazing bikini body on the beach in Hawaii