The 'Can't Be Tamed' singer uploaded the video of her performing the new "twerking" dance sensation to rapper J Dash's track WOP, reported Sun online.
The 20-year-old singer-actress is seen shaking her booty for the camera in the raunchy routine and only reveals her identity at the end of the clip when she removes a hood from her face.
Cyrus, who has denied reports she has split from fiance Liam Hemsworth, also keeps her engagement ring covered up by wearing a glove on her left hand.
Cyrus' celebrity pals also showed their support - producer Pharrell Williams, rapper French Montana and models Amber Rose and Cara Delevingne all shared links to the clip on their Twitter pages.
Black Eyed Peas star will.I.Am wrote, "Check out my homegirl Miley Cyrus twerk... Twerk it girl, work it girl... don't hurt it girl...