Rachel Bilson with her boyfriend Hayden Christensen on vacation in Barbados island to celebrate Hayden 30th birthdays. Rachel wears a sexy tiny two-piece red bikini and spent the day swimming in the Caribbean sea and strolling around the white sandy beach. Rachel Sarah Bilson (born August 25, 1981) is an American actress. Bilson grew up in a California show business family, and made her television debut in 2003, subsequently becoming well-known for playing Summer Roberts on the prime time drama series The O.C
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