Show everyone that girl power exists in a Girls Superhero Costume! Prepare to save the world from candy stealers and bullies as Catwoman, Supergirl, or in a Wonder Woman costume. Don't stop there, team up with your best friends in a Power Rangers costume or as Black Widow from the Avengers. Show off those muscles, hide your identity, and make sure to always have the best sidekick next to you. Fight for justice this Halloween by shopping here at Spirit Halloween and ensuring you have the best superhero girls costume out there!