Hilary Duff Shows Off Toned, Slimmed-Down Bikini Bod in Hawaii

Hilary Duff showcased her abs and slimmed-down bikini body while on vacation in Hawaii on Sept. 3.

Wearing only a teeny tiny two-piece bikini, aviators, and hat, the Younger star’s abs were on full display as she soaked up the sun and enjoyed a little R&R on the island.

Duff, 27, has an incentive to work up a sweat — her trainer is hottie Jason Walsh, whom she enjoyed a flirty night out with prior to jetting off to Hawaii. See the photos on Us Weekly