besides ruining the song for me, one of the good things i can see is that perhaps more people will come to appreciate trap music
or we get shitty bandwagoners who dont appreciate the music but just follow things because they are "in"
The last being the most realistic one. It didn't come to me as a surprise when Gangnam Style started exploding everywhere because the genre in itself was acclaimed by the majority, and I don't care really about those types of bandwagons since there is nothing from it that I can relate to. (Dance music sure isn't my cup of tea)
It may be a hispter thing to say, but I haaaaate when a giant mass of people get into things and music you consider is less accessible for the sole reason that it originates from a trend. I remember just a few years ago when I made new acquaintances with a bunch of people that knew some songs I wasn't expecting them to know (at least certainly not in my area). They were just like "yeah, well it's from Guitar Hero". And what do you know, during the few next years, everything dumped out of that game was the bestest music.
I kinda liked the concept of Harlem Shake though (trap music already being into my league), it's kind of humorous only on the surface but it doesn't go really far. At least for the surprise, and the contrast before and after the cut. Only one I think I can go back any day is Matt and Kim's:
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