US songstress Miley Cyrus has joked she often feels she "pimping out" her fiancé Liam Hemsworth because she always gushes about how good looking he is.

The 'Can't Be Tamed' singer is engaged to the 'The Hunger Games' actor Hemsworth, and has opened up about her romance in the new issue of Cosmopolitan magazine.

Miley, 20, has laughed off her constant praise of her beau.

She quipped to ET Online: "I'm the only fiancée that pimps her fiancé out. [I talk] about how hot he is. All these women are reading about sex in Cosmo, and then it's like Liam naked in the pool. So he loves it, I'm sure."

In the interview, Miley gushes about how attractive she finds her husband-to-be.

She giggled: "I'll literally look at him and be like 'You are hot, dear god!' The other day, I turned on the pool heater and it was steaming, and he walked outside and took off his clothes and jumped in the pool."

Miley is posing provocatively on the cover of the magazine, exposing her breasts underneath a white blazer.

When asked whether it was her idea to pose in that way, Miley quipped: "I guess it's always all my fault!"