STOPPP. I know she was fuming when she found out,”a fan said of the Vogue editor-in-chief, who is known for her perfectionism.

The Vogue editor-in-chief, who’s presided over the Met Gala with a polished grip since 1995, appeared to have possibly suffered a rare red carpet slip-up tonight — thanks to what the internet believes was an unfortunate crimson stain on her custom Louis Vuitton gown.

Anna Wintour, known as a stickler for perfection, now has to deal with some MET Gala attendees who broke the rules.