Winnie Cooper as You’ve Never Seen Her Before

Little Winnie Cooper from "The Wonder Years" isn't so little anymore!

Danica McKellar is now 38 years old and looking sexier than ever. The actress was spotted on the set of Avril Lavigne's new music video for her single "Rock N Roll" in Palmdale on Thursday in an unexpected ensemble.

McKellar sported orange pumps, blue fishnets, red metallic shorts, and a cropped top and denim jacket, giving a whole new meaning to the term "hot mess" — especially when it comes to her abs! But McKellar is a smart woman. With her degree in math, we're sure this is a calculated move.