It's my daughter's birthday next week and am planning a theme party for her. Any ideas for what themes are in fashion right now?

It does depend on the age, their interests, and what they are reading and what is recently out in movies/ shows. My kids went through 3/6 Fairy, 4/7 Princess, 5/8 Doc McStuffins, 6/9 Frozen, 7/10 Big Hero Six and 8 /11 Harry Potter most recently. ( Yes, I make my girls share a birthday party. long story )