Anna Wintour apparently did a huge no-no by appearing in public wearing the exact same dress she's worn in public before.

The editor of Vogue appeared last night on David Letterman in a black and white floral dress by Carolina Herrera, sunglasses, and a chunky necklace. Wintour had worn the exact same dress at the 2009 CFDA Awards on June 15,

So now people all over are making a huge fuss over the high-profile woman who wears a dress more than once. The good thing is, the Carolina Herrera brand must be getting a whole lotta good publicity from this.