Justin Trudeau and Katy Perry go Instagram offical  CTV NewsKaty Perry and Justin Trudeau go Instagram official with selfies from Japan trip  Toronto StarJustin Trudeau Confirms Relationship With Katy Perry. “Craziest Hard Launch In History,” Says Internet  NDTVKaty Perry goes Instagram official with Justin Trudeau after couple’s first diplomatic date in Japan  The IndependentKaty Perry Goes Instagram Official with Justin Trudeau as She Shares Intimate Photos from Their Visit to Japan  People.com