It was Harley Quinn! Every kind of harlequin fancy dress ended up being on show for Christmas and New Year’s parties this year. And Google Trends says this was the costume that most people entered online when searching fancy dress costumes. Celebrities got in on the act, with Louise Redknapp wearing the fancy dress for  the Strictly Come Dancing Halloween Special and Holly Willoughby wore the fancy dress outfit for Celebrity Juice. Other fancy dress trends of the year, from Amazon - sales of fancy dress for pets rose by 700%. And the release of Harry Potter and the Cursed Child caused hundreds of thousand of people to invest in a Wizard costume for the book’s launch in July 2016, many of which were on show again at New Year’s Eve events around the globe and we've seen some wands being waved in the queues for Fantastic Beasts and Where to Find Them.