This movie's so dumb, fake & gay
Well, in art history modernity or 'modern' is the early to mid 1900's leading up to the world wars and global industrialism. Post-modernism is the ethos of deconstructionism and foundationless irreverence, and anything being produced by living artists is just called 'contemporary'.
In terms of music, all the way back to the beginning of recording and broadcasting you had social engineers pulling the levers and deciding what gets put on the radio. Then shit like the 60's and Laurel Canyon was a whole other stage of mass psy-op controlled counter culture fabrication. Now pop and hip hop bleed into every genre like country and alternative and it's all just a soup of highly produced and finely tuned mind control.
Celestial plasma figures observed around the world.