MILEY CYRUS 9 YEAR OLD SISTER PERFORMING TIK TOK!

If you thought Miley Cyrus was too mature for her age, you ain't seen nothing yet.

Miley's nine-year old sister Noah appears in a new YouTube video in which she lip syncs the words to Ke$ha's racy new single "Tik Tok."

She dances around in a pair of white sunglasses and a Miley t-shirt, robotically twirling a pole and swinging a light saber at a goateed stranger behind her.

The song, which includes lines like, "I'm talking about everybody getting crunk, crunk/ Boys tryin' to touch my junk, junk," would seem inappropriate for a nine-year-old - if only that same nine-year old had not already worn a dominatrix costume on Halloween and previously videotaped a dance to Akon's "Smack That."