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 Raves About Bringing ‘Partner’ Katy Perry to Meet Japan’s Ex-Prime Minister in First Joint Political Appearance  People.comKaty Perry goes Instagram official with Justin Trudeau after couple’s first diplomatic date in Japan  The IndependentJustin Trudeau Confirms Relationship With Katy Perry. “Craziest Hard Launch In History,” Says Internet  NDTV