I've been doing this a long time. I started in radio during the rise and fall of grunge. I watched techno music get popular, fade out, and come back again. I've been in radio for 2 waves of boy bands (Backstreet Boys vs. N'Sync, then One Direction vs. The Wanted). I remember when it was all the rage to put movie clips in songs ("you had me at hello"), and when every pop diva had to have a rapper on her song. From Aaliyah to Zhane, I've heard one-hit-wonders, and novelty songs, and thought I had a pretty good handle on why songs became popular. Which is why I am completely stumped by Psy's 'Gangnam Style'.