Life Elsa and Spider-Man! These are the most popular kids’ Halloween costumes for 2019 October 1, 2019October 2, 2019Sonja Haller, USA TODAYComments Off on Elsa and Spider-Man! These are the most popular kids’ Halloween costumes for 2019 Princesses and Spider-Man make the top 10 list of most popular Halloween costumes again this year, according to the National Retail Federation.