Katy Perry and Rihanna's Met Gala looks went viral. But they weren't real.

The annual Met Gala is a chance for celebrities to out-do their previous red-carpet looks on the steps of New York's Metropolitan Museum of Art and for the rest of us to observe (and critique) at home. But this year, it became a little harder to do so with confidence, thanks to the infiltration of artificial intelligence.

This year's Met Gala was flooded with AI-generated celebrity looks, bestowed upon a roster of pop culture icons from Katy Perry to Rihanna. Some of these images were of people not even present at the event...