India, Dec. 8 -- Singer-songwriter Katy Perry seems to have made it official, taking her budding romance with former Canadian Prime Minister Justin Trudeau to Instagram. In a heartwarming post, the pop star shared a string of pictures from her Japan vacation, including one with Trudeau. In one of the pictures, Perry and Trudeau can be seen cosying up, posing cheek-to-cheek for a cute selfie. Another video in the post showed the couple having a meal together. P11...