updated 12/30/2012 AT 10:50 AM ET
•originally published 12/30/2012 AT 11:30 AM ET
Ashlee Simpson is sending 2012 off with a bang!
The 28-year-old showed off her svelte figure in a tiny bikini as she splashed along the shores of Oahu, Hawaii on Saturday.
Ashlee – who recently split from Boardwalk Empire actor Vincent Piazza after a year and a half of dating – smiled as she held hands with Bronx, 4.