She's wearing a bennie type hat, a deep v-neck dress, white tights, and Mary Janes!
Here's an option for the beret:http://www.forever21.com/product.asp?catalog%5Fname=FOREVER21&category%5Fname=acc%5Fhat%5Fhairgoods&product%5Fid=2067997329&Page=all#
Also, the shoes look similar to these (obviously there aren't many sizes left so I am still looking for more avaliable shoes):http://www.target.com/Xhilaration-Sydney-Mary-Jane-Pumps/dp/B00178YUPU/ref=br_1_27?ie=UTF8&frombrowse=1&searchView=grid5&searchNodeID=13848791&node=13848791&searchRank=pmrank&searchPage=1&rh=tgt_1%3APumps&searchSize=30&id=Xhilaration%20Sydney%20Mary%20Jane%20Pumps
Here is another pair of mary jane pumps:http://www.famousfootwear.com/Shopping/ProductDetails.aspx?p=75497&pg=1019048
Here's another coat I think the sleeves are closer to what she's wearinghttp://www2.victoriassecret.com/commerce/onlineProductDisplay.vs?namespace=productDisplay&origin=onlineProductDisplay.jsp&event=display&prnbr=EH-155460&page=1&cgname=OSCLOOUTZZZ&rfnbr=6620