One of the biggest signs a celebrity relationship is serious is going Instagram official and appearing in public together. Katy Perry and former Canadian PM Justin Trudeau have already crossed that ...

A popular Instagram account's followers questioned why they posted a video highlighting Perry and Trudeau's relationship.

Mr. Marche is the author, most recently, of “The Next Civil War: Dispatches From the American Future.” The former Canadian prime minister Justin Trudeau and the pop star Katy Perry are now publicly a ...