It looks like the phrase you provided — — is highly unusual and doesn't correspond to any known news event, artwork title, or public record.
In this interpretation, “Girlx Nn Grabbed Showstars Off Filedot Chagall” is not a phrase with intent but a fossil of a broken communication chain—a digital coelacanth. Girlx Nn Grabbed Showstars Off Filedot Chagall ...
If you could provide more context or clarify your original topic, I'd be happy to try and assist you further! It looks like the phrase you provided —