She is wearing Fausto Puglisi coat and dress on the cover that was photographed by Gabor Jurina with styling by Zeina Esmail. (source)
Click here to view last year cover featuring Miley Cyrus, here to view 2012 cover featuring Linda Evangelista, here to view 2011 cover featuring Gwen Stefani, and here for 2010 cover with Christina Hendricks.