Q. I saw a recent photo of Jessica Szohr (from "Gossip Girl") walking in New York with the cutest brown leather bag. Do you have any idea who makes it?

A. Jessica was wearing the Sienna bag by Kooba. This particular style is an anniversary edition of the bag, which originally launched years earlier and was an instant hit among stars like Sienna Miller, Teri Hatcher, and Sarah Michelle Gellar.

For the brand's ten year anniversary in 2008, the designers decided to bring back some favorite bags from seasons past, so they launched a new version of the Sienna (along with two other popular styles -- Scarlett and Frankie). As always, celebs like Szohr were the first to get their hands on them.

Kooba was launched by Abbe Held (in partner with her mother) in 1998. The idea behind the brand was to create new, well-constructed bags with a vintage feel.

The warm brown color of this bag makes it a great Fall/Winter staple that's not too harsh to keep toting through Spring and Summer. The Sienna bag retails for $595, and comes in other colors, too: