A giant diamond ring wasn't the only thing Miley Cyrus flashed on Saturday night.
The former Hannah Montana star, 19, arrived at at Muhammad Ali's Celebrity Fight Night XIII event in Phoenix, Ariz., with boyfriend Liam Hemsworth, 22, in a peach lingerie-inspired dress, which featured cleavage-revealing lace detail.
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For her performance later on, she hit the stage in an equally low-cut black halter-style look with totally open sides that showed off the giant tattoo on her ribcage.
Cyrus was especially thrilled with her manicure that evening, tweeting: "I am soooo obsessed with @jennahipp nail foundations! It looks so chic and classic!" along with a pic of hair beige-colored tips.