One-shoulder gowns were all the rage at the state dinner honoring Mexican President Felipe Calderon and wife Margarita Zavala last night in D.C.
![](https://images.toofab.com/image/5b/o/2010/05/20/5b20a6bf703250d3a3340f20131bca56_md.jpg)
First Lady Michelle Obama dazzled in a blue Peter Soronen dress, while Eva Longoria (in Reem Acra) and Gayle King (in Carmen Marc Valvo) opted for tangerine.