This is a Ralph & Russo dress at its most happy. Here it is, adorning Blake Lively at a Canadian State Dinner in honour of Prime Minister Trudeau and Mrs. Sophie Grégoire Trudeau of Canada at the White House, along with husband Ryan Reynolds. And don't the cut quite the handsome couple. 

You want to see the footwear, understandable...

Other Canadian celebs attending the event include Michael J Fox, Mike Meyers (Wayne's gone white and he's OWNING it) and Sandra Oh. There was no sign of Justin Bieber, which is surprising.