PIC: Nicole Richie Strips Down to Bikini for Post B-day Weekend

Celebrity Body Sep. 25, 2011 AT 1:32PM
PIC: Nicole Richie Strips Down to Bikini for Post B-day Weekend Credit: Clasos.com/Splash News

After partying at her Beverly Hills 30th birthday bash on September 21, Nicole Richie has taken the celebration south of the border.

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The married mom of two enjoyed some fun the sun with fruity cocktails and close pals including Samantha Ronson (who also sported a two-piece) in Los Cabos, Mexico Friday.

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Clad in a tiny black bikini by Eres, the birthday girl flaunted her healthy figure but showed no sign of vegging out on the massive three-tier birthday cake at her A-list party two days prior, where she gathered a bevy of family and friends like her hubby Joel Madden, Ronson, Mary-Kate Olsen, Benji Madden and dad Lionel Richie at a deluxe suite at the Beverly Wilshire.

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"I can't believe the outpour of birthday love I am getting on twitter today!" Richie wrote on her Twitter account September 21. "From the bottom of my heart (& the top), THANK YOU SO MUCH!"

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