Miley Cyrus has tweeted a picture of herself and her ultra miniature waist.

Miley Cyrus, 19, was clearly so impressed with her own figure, that she even chopped off her head from the snapshot to focus solely on her taut and toned midriff.

Alongside the picture, the Hannah Montana actress added the caption: “my <<Fiance>> jeans. but for real though.”

The wording is a play on the popular boyfriend-style of jeans that are popular with girls who favor baggier trousers and the fact that Miley Cyrus is now engaged to Hunger Games star Liam Hemsworth.

Miley Cyrus has tweeted a picture of herself and her ultra miniature waist

Following her obsession with Pilates and workouts, it seems Miley Cyrus’ figure has continued to shrink, with the actress taunting critics by flaunting her sculpted body at every opportunity.

Even her fitness instructor spoke out on the issue, but in Miley Cyrus’ defense saying there is nothing to worry about when it comes to the singer’s health.

Mari Winsor told People: “I think people need to chill out. She’s healthy and she feels good, that’s the main thing. She’s smart about her body. She wanted to sculpt her body, that’s all.”

The fitness guru added: “When this girl comes in, she is on fire. She’s focused.”

But whatever Miley Cyrus’ secret, it seems she may not be so sure herself – or at least, doesn’t want anyone to know.

Back in April, Miley Cyrus claimed her changing shape was not a quest for size zero, but a health issue.

Miley Cyrus tweeted: “For everyone calling me anorexic I have a gluten and lactose allergy. It’s not about weight, it’s about health.”

However, last night Miley Cyrus insists she does eat, saying: “upallnighteatinchicken&waffles/makin beats.”