Popsugar Entertainment Halloween Costumes 2021 The Best Pop Culture Halloween Costume Ideas For 2021 60 of the Best Pop Culture Halloween Costume Ideas For 2021, From Marvel Heroes to Cruella de Vil 9 September 2021 by Alessia Santoro View On One Page Photo 9 of 56 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 9 Kate From Firefly Lane What to wear for Kate: Grab an oversized pair of clear glasses, a button down shirt or blouse, and jeans or trousers. Previous Next Start Slideshow Halloween Costumes 2021Halloween Costumes For MenGroup Halloween CostumesDisney Halloween CostumesHalloween Costumes For WomenCouple Halloween CostumesPop Culture Halloween CostumesMoviesHalloween CostumesHalloween