Miley Cyrus' abs for $15? Star's Pilates instructor Mari Winsor

The 19-year-old star credits Mari Winsor Pilates for her new found abs, practicing several times a week to maintain her fit figure.

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10 Times Miley Cyrus Rocked Her Workout

10 Times Miley Cyrus Rocked Her Workout

10 Times Miley Cyrus Rocked Her Workout

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