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Miley Cyrus has really transformed herself lately -- from her hair to her tight abs!

The former "Hannah Montana" star recently took a trip to Costa Rica with fiance Liam Hemsworth and his family, where she showed off her impressive body on the beach.

While flaunting her fit physique, Cyrus also gave us some insight into how she maintains it: Yoga. The 20-year-old was spotted doing a number of positions in two different swimsuits. 

Last year Cyrus also revealed one of her diet secrets, tweeting about going gluten-free. "The change in your skin, physical and mental health is amazing! U won't go back," she said at the time.

Everything she's doing is clearly working. 

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Check out more celebrity beach bods in the gallery above!

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