We'll figure it out on the way…
Come on, people, don't you know the Lizzie McGuire theme song when you hear it?!
Well, now that we've officially jogged your memory, let's get to the important part: Hilary Duff is 25!
From her days as a tiny teen on the Disney screen to her current real-life role as a Hollywood mom, the blond beauty's been busy growing up right before our eyes.
Before Hilary and Mike tied the knot, girl was busy adding to her acting résumé with films like Cheaper by the Dozen and A Cinderella Story.
And before that? Well, you know you could find Hilary on the boob tube as the ever-adorable Lizzie McGuire—the role that really ignited her career.
But while Hilary's days of hair crimping, crazy pants and Miranda and Gordo love might be over, it's clear the actress and her star power are here to stay.
Congratulations, Hil! You've made it to 25 without any drug busts, DUIs or rehab stints (an impressive feat for any child star).
So, in honor of Hilary's big day, let's take a look back at the new mom's best moments throughout all of her years in the biz.