It's no secret that Michelle Obama is one stylish first lady, but her look for the state dinner last night was jaw-droppingly good. For the White House-hosted event in honor of Chinese President Xi Jinping, the first lady wore an off-the-shoulder Vera Wang mermaid gown with tulle sleeves and a V-shaped neckline. With her hair swept to one side, the effect was wholly glamorous and swoon-worthy. When we saw the first image in our Instagram feed (a peek from the first lady herself), we could hardly look away! For her part, Wang said via Twitter: "It is such a privilege, as an American of Chinese heritage, to have dressed First Lady @MichelleObama for this state dinner." Keep scrolling to see the dress we can't stop staring at!