If not, here's a quick refresher course. She was sitting in the stands during boyfriend AJ McCarron's football game last year and sportscaster Brent Musburger brought so much attention to her, people kind of forgot about the football game for a few minutes.
Oh, and she's also a beauty queen, so there's that.
Anyway, Katherine just took to her Instagram to prove that she's just as beautiful without makeup as she is when she's all done up.
"Feeling confident enough today to post this, finally. I have quite a few imperfections too! Grew up feeling insecure and self-conscious about my skin and the white patches that cover half my body, but I don't care what people think anymore. I just had to get really good at doing makeup," she captioned the photo, along with this quote from Kevin Aucoin, a celebrity makeup artist: "That's why I began doing makeup in the first place: I was hoping that through helping people see the beauty in themselves, I could try and find it in me."
Katherine isn't the only one to share a makeup-free selfie. Beyonce and Lorde have both recently shared fresh-faced photos of themselves and it seems that more and more celebs are using their platform to show that there's so much more to "beauty" than simply using the right beauty products.
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Gallery | These Stars Should Wear Less Makeup More Often!