i am trying to find out who designed(and possibly buy) the black dress
that kate hudson wore in "10 ways to lose a guy" when she first meets
matthew in the bar...please help

"...One thing that was very planned, however, was the costuming, and
because the two main characters and most of the supporting cast worked
either in fashion or in advertising, their clothing had to reflect the
contemporary style of their professions. Costume designer Karen Patch,
who dressed the cast in “The Royal Tenenbaums,” joined Lynda Obst and
Kate Hudson in Paris to research and shop, shop, shop.
“We practically devoured thrift stores that had all kinds of fabulous
designer clothing,” remembers Patch..."
http://www.rock-n-reel.com/CDFeatureDetail.asp?featureID=12