This is old…
Ever the fashionista, Myrtle dons an eye-popping red dress as she's led to the stake in American Horror Story: Coven's finale, and as the flames are about to consume her, she cries out "Balenciaga!" This is actually the name of a luxury fashion brand, but oddly, her dress isn't a Balenciaga since the show couldn't afford to buy such a dress for the scene. Murphy revealed there's no real deeper significance to Myrtle yelling this out, and it's just in keeping with the character's quirky sense of humor. Either way, it can't be denied she went out in style.
https://screenrant.com/american-horror-story-coven-myrtle-balenciaga-meaning/