Popsugar Entertainment Halloween 40 Best Sister Costume Ideas For Halloween 2023 40 Best Sister Costume Ideas For Halloween October 6, 2023 by Maggie Panos First Published: October 1, 2015 View On One Page Photo 22 of 41 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 22 Sister Halloween Costumes: The Ghostbusters What to wear: A Ghostbusters suit is easy to come by in any costume store, but adding extra touches like the right hair, accessories, and personalities will make your costumes that much better. How to act: Not afraid of no ghosts. Previous Next Start Slideshow HalloweenHalloween CostumesPop Culture Halloween CostumesTVMovies