I need help with a mashup/DJ Earworm paper thesis?

I'm developing a 25pg paper and am racking my brains for a focus --something to latch onto. I'm looking at the music genre of mashups and their rise in popularity with DJ Earworm's the United State of Pop series as the epitome of the movement. I feel that arguing "significance" isn't enough. Perhaps it's use as a snapshot of my generation? I could look at it's role in defining this new generation...any ideas from others would really help getting me focused --at the moment I feel like I don't know where exactly to put my research efforts besides basic info on the artist and genre.