Hilary Duff doesn't regularly show much skin, but this week she's breaking her own personal rule by strutting her stuff at the beach in a small black bikini.

The Material Girls actress is in Hawaii vacationing with her hockey-player boyfriend Mike Comrie, taking a break from her preparations for her role as Kathleen Holtz in the upcoming series Barely Legal. She's due stateside next Monday, so most likely these will be the last Hilary Duff bikini pictures we'll get to see this season. Enjoy!