Ashlee Simpson flaunted her incredible bikini body in a black and white swimsuit while vacationing with son Bronx, mom Tina Simpson and newlywed pals CaCee Cobb and Donald Faison in Hawaii on Dec. 29.
Although sister Jessica Simpson was no where to be found, her daughter Maxwell was seen on the beach with the rest of the family.
Jessica just announced that she's expecting her second child with fiance, Eric Johnson, next year. More playmates for the adorable Bronx!
Check out photos of Ashlee's bikini body below: