I was listening to a bunch of mashup songs. If you delve into it you'll find stuff like Danzig and Idol singing to a Rihanna song, or Bananarama doing vocals for Rammstein. The more of the mashup songs I heard, the more I started wondering are there only so many chord progressions, are commercial song structures set in stone, is the earworm a product of familiarity? While listening to those mashups, I thought there's no fucking way Roy Orbison's "In Dreams" could ever be mashed up..