From Parliament to Page Six: Justin Trudeau is living it up post-politics 

This time 14 months ago, even with his tenure as prime minister near its end, an embattled Justin Trudeau was still butting heads with Donald Trump over Canada’s sovereignty.

Nowadays, however, the 54-year-old spends his days skiing with Prince Harry, posing for selfies with his 21st-century pop icon sweetheart Katy Perry, or vibing in the front row at Justin Bieber’s Coachella comeback.

That’s precisely where Trudeau was this Saturday night, accompanied by Perry, who shared...