Hot mamas in Mexico!
Mother-of-two Richie, who just turned 30, proved that age is nothing but a number while sporting a black-two piece during a girls' getaway in Los Cabos with a few friends, including Samantha Ronson and Juliette Lewis.
Meanwhile, Simpson could be seen in a black polka-dot bikini as she lounged poolside in Cabo San Lucas.
While son Bronx wasn't around, it was still a bit of a family affair, with her dad Joe and sister Jessica on hand. Also lounging around? Simpson's new man Vincent Piazza.
And get this. At one point over the weekend, these two lovely ladies actually met up for a little lunch. Hey, when you're both in the same general area, why not?
All of this, of course, leads to the most important question of all: Who looks better in a bikini? Sound off in the comments!