Quietly today, fiancee Hailey Baldwin made things official and changed her name on Instagram to Hailey Bieber. It is a small change in the grand scheme of thing but it finally puts any doubts about the couple's seriousness to bed. The move makes a great deal of sense in the wake of news that Baldwin (Mrs. Bieber?) had filed a trademark on the name Hailey Bieber. It doesn't get more unambiguous than that.