Miley Cyrus Encourages Little Sis to "Smack That"

Noah Cyrus, age 9, sings and dances to dirty Akon track at the urging of her teenage sibling

Oh boy.

Remember when Miley Cyrus' little sis followed her lead and danced on a pole? And then, a few weeks later, when she dressed as, well, something deeply inappropriate for Halloween?

Well, Noah Cyrus just topped herself.

At the "Climb" singer's urging, the 9-year-old busted into her very own rendition of Akon's raunchy "Smack That," complete with dirty dance moves. We're talkin' shimmies, dips "all on the floor" and booty pats.

It's difficult to determine which is more wrong in this situation, the tot's antics or the teen queen she looks up to egging her on.