India, Dec. 6 -- Singer-songwriter Katy Perry paused her The Lifetimes world tour to join boyfriend Justin Trudeau and former Japanese Prime Minister Fumio Kishida with his wife Yuko for a Tokyo meet-up on Wednesday. The couple went public in late October during Perry's 41st birthday celebrations in Paris, where they also attended a cabaret show. The former Japanese leader thanked the ex-Canadian PM for keeping their friendship alive after leaving office....