When Blake Lively [1] stepped out to help husband Ryan Reynolds [2] rep his Canadian roots at the State Dinner [3] on Thursday night, she pretty much stole the whole show. She arrived at the White House dinner [4] honoring Canadian Prime Minister Justin Trudeau and his wife, Sophie Grégoire-Trudeau [5], in a design we didn't see coming. On the heels of her latest red carpet appearances where she selected embellished Chanel dresses [6], she switched into a satin Ralph & Russo robe dress, complete with subtle shoulder cutouts and a sexy slit. To finish it off, she added jewel-drop earrings, a Swarovski crystal-covered Marchesa clutch, and a pair of understated sandals. Not only did she upstage her husband, but she may have just upstaged the guests of honor, too. Read on to see if you agree.