Don't you want to resist to turn to explanations like this, that require some invisible force to pull the strings? I think there are more realistic ways to imagine this happening.
If for example a pop star is getting a lot of attention, in multiple countries, what is the mechanism behind that? And is it orchestrated?
I have heat pumps through a mini split system. I like them so much I’m redoing my entire HVAC to add ducts with heat pump powered heating and AC. They’re kind of a miracle: they produce great heat (way better than a gas-powered furnace), they’re ultra-efficient, and they’re whisper quiet.
I don't really know how trends and fashions form and haven't thought so much about it. Some aspect of it might look like research into the ising model and phase transitions - small changes in "temperature" everywhere in the mass of people might look like a phase transition in the overall mood.