Ed Sheeran releases two singles at once and locks everyone else out of the top end of the charts. Then he releases a new album and almost breaks everything as every one of its tracks makes the Top 20. So the rules are changed in the summer to ensure nobody can ever do that again - although not everyone is happy. This is also the year of the Spanglish hit, by the time it ended (with Ed Sheeran on top of the charts again) we were all Despacito for it to be over.