What would happen if we took your favorite fashionable celebs, showed them five outfits they've worn out in public over the years, and asked them "What Were U Thinking?" You're about to find out!

This week, we're asking actress Ashley Greene. When Ashley set out from Jacksonville, Florida on the road to Hollywood, California, she had no idea at the time that she would end up starring in the film adaptation of the most popular series of books since 'Harry Potter.' That series was 'The Twilight Saga,' written by Stephanie Meyer, and since the books first hit the stores, they've become a national phenomenon. Ashley was cast as vampire Alice Cullen, sister of Edward Cullen and friend of Bella Swan, the lead characters. Since that time Ashley's been put through a crash course of how to dress for the red carpet and the paparazzi – no leather jackets and floral dresses, clutches instead of bags, and don't overdress when it's not your premiere! Her striking beauty and figure have caused many to comment on her similarity to another Hollywood fashion icon, Audrey Hepburn, someone Ashley adores and uses as fashion inspiration.

Ashley also became involved in Donate Your Dress, a charity where girls donate gently used prom dresses to girls who can't afford them. Ashley's eager to see that everyone can have a night of glamour and beauty, no matter what. Now with New Moon coming out, we'll definitely be seeing a lot more of Ashley Greene and her fabulous fashion sense on the red carpet.

MTV would like to thank Fairy Godmothers, Inc, Prom Fair, LA's Prom Closet, Caitlin's Closet, Kenzie's Closet and Cinderella's Closet for their contribution to this episode of WWUT.