https://www.techdirt.com/articles/20190329/10052041897/ariana-grande-demands-all-photographers-her-concerts-transfer-copyright-to-her-nppa-revolts.shtml

We've seen plenty of ridiculous demands from performing artists over the years as to what photographers can and cannot do while attending their performances. This sort of thing typically amounts to a desire for some kind of control over which images get released and which don't. That kind of attempt at control is silly, of course, and runs counter to the journalistic principles that many of these photographers employ.

But if you want to see the really batshit crazy extreme of all this, we need apparently only look to the rules that Ariana Grande's tour puts on photographers.