I love pairing sweet, feminine pieces with sportier ones.  Basic sweatshirts work just fine with a lady-like lace skirt, but when you add a little embellishment it ups the elegance ante, even when the whole things combined with sneakers so you can survive a full day of running around.

{Loft sweatshirt; J. Crew skirt (similar from J. Crew); Tretorn sneakers; ℅ Sunglass Warehouse}