Man, another stunning look from LSS! This will go on my list of favorites, which so far consists of THREE one shoulder gowns I think it should be a signature look for her. She rocks them! I kinda wanted to say Lanvin, or Marchesa, but I don't actually know much, so I'll leave the fashion sleuthing to our expert: Dragon!
My other faves are the one Xiao Xiao just posted, and that light breezy, white and orange one shouldered dress, that I know some people called a bedsheet haha.