It's easy to forget that Miley Cyrus is just 15 years old. (Isn't it, Justin Gaston?)

But the Hannah Montana star can't even drive with a permit until next week and it's refreshing to see her act that way sometimes. (Though Justin Gaston likely disagrees.)

During a pair of recent public appearances, the singer finally acted her age. She posed alongside a pretend canine and she made a goofy face while wearing oversized glasses. Take a look:

Why is Miley being so silly? BECAUSE SHE'S ONLY 15 YEARS OLD! (Keep that in mind, Justin Gaston.)