Katy Perry AI Photos of Her at Met Gala Go Viral, Dupe the Internet

Katy Perry is NOT at this year's Met Gala -- but the internet certainly thought she was for a moment, and it's all thanks to that tricky AI ... which cranked some very real-looking shots. Photos of the singer that purported to place her at the high-fashion event started circulating Monday -- with a couple of X users randomly throwing these shots into the mix ... and hoping no one would notice they were totally…