Miley Cyrus is definitely as fit as she can be.

Last spring, she defended herself from people who criticized her very slim body, which she attained through having Pilates and, more intriguingly, a gluten-free diet. Now engaged to Australian actor Liam Hemsworth, Miley, 18, flaunted the body she’s proud of to her nearly 7 million Twitter followers.

The photo featured the singer/actress’s teeny-weeny waist as she wears a baggy green pair of pants—which may or may not be Hemsworth’s—and a stripped, tight crop tee. She captioned it:

My ‘Fiance’ jeans. But for real though.

Back in April, Miley answered rumors regarding her being anorexic, saying:

For everyone calling me anorexic, I have a gluten and lactose allergy. It’s not about weight — it’s about health. Gluten is crap anyway!

Seems like we’ve got a brand new kind of diet in town!

Photo: Miley’s Twitter