Erinn is a 16-year-old high school student about to enter her senior year. At school, she's an 'A' student — but when it comes to fashion she's scoring below average because of her mismatched socks and clashing colors. In a What Not to Wear Back to School special, Stacy and Clinton teach this teenager how to build a wardrobe that will take her through her senior year and into college.

Erinn needs to dump the too-short shorts and skirts, and add a little bit more sophistication to reflect her hard work and accomplishments. As for her hair, Erinn prefers it out of the way as she pours over the books — so she always wears it tied back. But after a straightening treatment, hairstylist Nick Arrojo cuts it into a classy and yet easy-to-manage bob fit for a hip young scholar, and makeup artist Carmindy teaches Erinn how a little can go a long way — even in the every day setting of a high school classroom.