How fun are celebrity throwback photos? Not only do they give us an opportunity to see how much our fave celebs have changed over the years, they serve as proof that sometimes even the most gorgeous actresses and singers struggled with really bad hair days. Take the girl in this shot. Nowadays, she's a stunning actress on a hit TV series. You'd expect that maybe she looked like a teen goddess or that she had to be homecoming queen.

But the girl with this mullet and big gap in her teeth is actually ...

Mad Men's January Jones -- can you believe it?! The star posted this awesome throwback photo on her Instagram account. She was adorable, for sure, but I would have never recognized the Grace Kelly lookalike from her childhood photograph.

This picture has us thinking about other celebrities and how they looked when they were younger. Check out the slideshow and see if you can guess who the 7 female stars are based on their "before" photos.

Were you able to guess all of them?

 

Image via Instagram