Hitha Herzog wearing a one shoulder top, midnight blue gown.
I don't do black tie a ton, but when I do, I don't f--- around. This Sophie Theallet. Don't know who she is. Check out her bio (source Wikipedia):
Born in 1964 in Bagnères-de-Bigorre, France,[1] Sophie Theallet is a French fashion designer[2] whose clients include First Lady Michelle Obama. (And me!)
At 18, Sophie Theallet moved to Paris to attend the fashion design school, Studio Berçot. She graduated early after winning France's “National Young Design Award” and was hired by Jean-Paul Gaultier.
Theallet then joined Azzedine Alaïa for a decade before moving to New York. She now lives in Brooklyn Heights
After moving to New York City, Sophie continued to work with Alaïa on a part-time basis, while also freelancing for other fashion labels.
In 2007, she launched her own label, Sophie Theallet. In 2009, she won the CFDA/Vogue Fashion Fund Award.