Christina Aguilera and DJ Sam Ronson were among the pals who joined the socialite, jeweller and reality TV star for the weekend (18-19Sep10) Cabo San Lucas getaway.
According to People.com, the girls relaxed by the Las Ventanas resort pool and enjoyed a series of spa treatments.
There was also a celebration dinner.
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Absent was Richie’s former best friend and The Simple Life co-star Paris Hilton.
Richie and Madden, who are the parents of two young children, have yet to reveal when they’ll wed.
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