Michelle Obama chooses one-shoulder gown by Peter Soronen for state dinner

First lady wears blue Sorenen gown to state dinner

Michelle Obama is wearing a shimmery-blue gown to the state dinner for Mexican President Felipe Calderon and his wife, Margarita Zavala. It has a one-shoulder silhouette, similar to the one Mrs. Obama wore to her husband’s inaugural balls.

The dress for Wednesday’s event was by Peter Soronen (SORE-nun). It was the fifth gown by the designer the first lady has worn.

This one has a fully-boned corset, a silver belt and layers of chiffon — with a bit of lame that Soronen said gives it that little bit of sparkle.

The New York-based Soronen knew that it was possible she’d wear the gown tonight, but didn’t know for sure until photos started to appear.