Nicole Richie says adios to singledom

Nicole Richie had a big ol' bachelorette party weekend in Mexico, and the guest list was star-studded. Christina Aguilera and Samantha Ronson were on hand to celebrate Richie's impending nuptials to Good Charlotte singer Joel Madden. And what was even more apropo: the marriage was announced o Jamie McCarthy / Getty Images for Bergord Goodman