Neither Katy Perry nor Rihanna were at the Met Gala in New York on Monday night. But you could be forgiven for thinking otherwise, after AI-generated images of the two celebrities started circulating on social media. Perry’s was so realistic, it even fooled her own mother.

The singer told her Instagram followers: “Couldn’t make it to the MET, had to work.” But the message was accompanied by several realistic-looking images that appeared to show her there. One was even accompanied by a text from her mother, Mary Perry.