Hey, the Disney tween was shooting a music vid (for "Fly On The Wall," a track off her latest album) - so leave her alone!

Check out Miley just bein' Miley in downtown LA, showing off some dance moves with her mom and pals on set this Saturday...

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We're SO proud that our girl has truly perfected the bitch face. It's a perfect combination of confidence, arrogance and sexiness. Miley's growing up fast!

But is that a good thing?