On her recent trip to Costa Rica to celebrate her fiancée’s birthday, Miley Cyrus showed off her flat abs in a newly released picture.

Blowing kisses for the camera, the “Party in the USA” songstress donned jean shorts and a colorful fitted belly-baring tube top.

As previously reported by GossipCenter, Ms. Cyrus and her “Hunger Games” hunk, Liam Hemsworth, enjoyed their tropical retreat with family and friends.

Back at home, the 20-year-old is hard at work on a highly-anticipated new album, her first after a two-year break from the studio.