Something tells us Miley Cyrus knew her long white skirt was a bit sheer when she put it on. Oh, Miley ... you seriously CAN'T be tamed.

Before heading to the recording studio, Liam Hemsworth's fiancee Tweeted the above photo and the following: "wearing my lucky tee shirt :) 🎶🎶🎶 off to make the dopest sh*t everrrr studio ❤ @jt_novak #sallyday u knows itttt"

The 19-year-old singer's tummy looks insanely toned ... thanks to all those long hours of yoga. You go, girl!

We can't wait to hear what Miley's been cooking up in the studio!