I'm not often wowed by sparkles, but I have been in love with Kate's sequined striped minidress ever since I first saw it. And she wore it just right, free of jewelry and other accoutrements, and with simple shoes.

Here's the discount version of her outfit:
Black Sequined Striped Cocktail Dress, $85.50
Black Pumps, $13.99
GRAND TOTAL $99.49