Ashlee Simpson partied poolside in a teeny polka dot bikini in Cabo San Lucas this weekend.
On Friday, the singer and actress hit the pool with some girlfriends, and was later joined by sister Jessica Simpson and new boyfriend, "Boardwalk Empire" star Vincent Piazza.
According to PopSugar, Cabo was more star-studded than usual. The Simpson sisters were spotted grabbing lunch with Nicole Richie and Samantha Ronson, who were celebrating Nicole's 30th birthday with some fun in the sun.
Check out some other celebs soaking up the sun: