Polish-American model Joanna Krupa has an incredible physique and is not afraid to flaunt it. The sexy 37-year-old animal activist and star of reality show “The Real Housewives of Miami” shared a series of nude photos with her Instagram followers Wednesday, one of which showed her wearing only a hat while sunbathing in the nude by a swimming pool. It was no surprise her upload garnered thousands of likes. She captioned the photos informing her fans that it was her birthday, adding that proper exercise and diet makes age irrelevant and that she felt healthier than ever.