The President and First Lady attended an official dinner at the Presidential Palace in Dakar, Senegal on Thursday evening. For the event, Mrs. O wore a Naeem Khan paisley print organza ballgown, previously seen at the White House Correspondents' Dinner in 2012, here. Of note are the cap sleeves, added for the occasion.
P.S. The photo above is the only from the dinner to be published at the time of posting. I hope there will be more to follow!
Update #1: Mrs. O wears floral gold lace pink amethyst cluster earrings by Alexis Bittar.
Update #2: Finally, a full look, from the White House Flickr stream. Gorgeous!