By Abha Bhattarai, The Washington Post After 11 years at the top, princess costumes have been dethroned as the most popular Halloween costume among children, according to a survey by the National Retail Federation. This year’s most coveted get-up: Superheros. “So far it’s superheroes across the board: For kids, for adults, for pets,” said Lorenzo Caltagirone, owner of Total Fright, a year-round costume shop in Arlington, Virginia “The female superhero in particular has really taken off.