Ginnifer Goodwin's Pixie Cut
The right layers in a pixie haircut make all the difference. The height and roundness through the crown area give it a feminine look.
One thing you want to do with a round face is to keep a little hair out in front of the ear and not tuck it back, like Ginnifer did here.
Another great tip demonstrated by Ginnifer is a deep part. Parts are perfect for a round face because they change the point of focus, so people can't determine that her face is the same length and width.
See also: More celebrities with pixie cuts