We can't wait to find out what it is! Read more about Mrs. O's upcoming cameo on the Iron Chef, here.

Sadly we can't use the photo, but it's a lovely one! Mrs. O wears a Liz Claiborne dress, paired with a Hattie Carnegie brooch from the Carole Tanenbaum Vintage Collection.

Better image via New York Magazine, here.

Photo by Mark Wilson / Getty Images 

The president and first lady have returned home to the White House, and while the Olympic bid was perhaps not a success, the first couple is certainly looking more stylish than ever! First Lady Mrs. O wears a graphic black and white dress, cinched at the waist with her longtime favorite Alaia belt and topped by a cropped black cardigan.

Update #1: We thought Mrs. O's windowpane dress looked familiar, but couldn't quite put our finger on it. We're delighted to learn that it's a dress from the Liz Claiborne New York Summer 2009 collection.

Update #2: Thanks to Charlene in Detroit, we've discovered that this dress is still available and on sale, here.

 Photo by Vittorio Zunino Celotto / Getty Images

First lady Mrs. O visited Palazzo del Governo in L'Aquila, Italy this morning with other G8 spouses. The medieval city was hit by a powerful earthquake in April 2009. As Mrs. O surveyed the damage, she said, ''I'm very moved. I and my husband have been very struck by what we're seeing and we'll try to do everything possible to support you."

Dressed in a yellow floral Liz Claiborne cardigan and chartreuse pleated skirt, Mrs. O brought a ray of sunshine. Fittingly chosen, Mrs. O wore a beaded brooch from Italian fashion house Moschino at her collar. Update: We've confirmed that Mrs. O's skirt is indeed J.Crew's cotton sateen Gateau skirt in chartreuse.