>>54054004
It was really sporadic because I knew nobody else in class would know anything about music so I could kinda bullshit my way through and just play pop songs (which I did), and mostly focused on the "biggest acts" at the time. Also, allow about a years deviation from the dates i give, nothing is completely exact. This was also 3 years ago so I'm just going of waht i kinda remember.
I started in mid-1987 when Guns n Roses released "Appetite for Destruction." 1991 Nirvana released "Nevermind" and basically shifted popularity from 80s hair and heavy metal to grunge. Grunge pretty much died out by 1995, when 'College' Rock (Dave Matthews, Hootie) became more popular, as well as rappers like Tupac and Biggie becoming more prominent.
1998 saw the resurgence in pop music, specifically boy bands and pop stars (Backstreet Boys, Brittany Spears, etc), and that was big until 2001 when Nu-metal became more of a thing (Linkin Park, etc). 2004 saw the rise in Crunk hip-hop as well as hard rock/emo/screamo, until 2006/07 when ringtone rap was becoming a thing.
late 08-09 saw another resurgence of pop artists, like Gaga, Katy Perry, Kesha, etc, and they sorta dominated for awhile until 2011-2012 when dubstep/EDM started becoming popular, as well as a renewed interest in hip-hop (and oddly enough, bluegrass-influenced acoustic pop as I call it), and even though dubstep kinda lost popularity we're still in that era now which is mostly dominated by EDM/Hip-hop. and some acoustic pop stuff.
That was basically the gist of it as I remember. Not perfect, but an interesting thought nonetheless i guess.