Bethenny Frankel -- Divorce War Does the Body Good!

Bethenny Frankel can definitely stomach a messy divorce.

While in the middle of a contentious breakup from her estranged husband Jason Hoppy, the 42-year-old former "Real Housewives of NYC" star showed off her fit rockin' bod in a blue bikini while vacationing in Miami with her daughter Bryn.

Skinnygirl for life.