Pierce, I have never heard of this before.
Phyllis, thank you so much. I was clueless and will probably check it out
I saw many videos and pics on social media , some outfits were amazing in regards to the art of it . some were hideous lol . but it looked like a fun event .
Dressing up in costumes can be fun! Thanks for sharing your comment with us!

Per google: The Met Gala, or Met Ball, formally called the Costume Institute Gala or the Costume Institute Benefit, is an annual fundraising gala held for the benefit of the Metropolitan Museum of Art’s Costume Institute in New York City. They dress up in weird costumes. Thanks so much for responding to this question!