They think in order to be pop, the song has to have 100 bpm, the singer has to be half dressed in a blond/blue/pink wig, bouncing up and down and there has to be pyrotechnics, strobe lighting, glitter or glow sticks on stage.
A bad imitation of Ru Paul's drag race set to a 3 minute generic euro dance beat for them to 'bop' to is what's "pop" to these kiddies born during Clinton's second term.