Joan Holloway is the style idol most women talk about about when it comes to the fabulous clothes in "Mad Men." But not all of us can be Joans, can we? Even though she has those awkward-looking bangs, Peggy Olson's wardrobe has progressed as quickly as her career at Sterling Cooper has. Sure, she's still got that whole innocent-librarian thing going on, but Peggy has finally started dressing like the woman she is. Click through for dresses with nipped waistlines, A-line skirts, tie-neck blouses, and sleeveless jackets that'll get you that promotion in no time.