Originally Posted by almonds

Yeah, I'd consider music on Z100 pop.

Anyway when I worked at a library, the CD area was split into Pop, Jazz/Blues, Country, Showtunes, Classical, World... and I think that's it. So Britney Spears, Led Zep, ABBA, Cascada, Usher, 50 cent, etc would all be pop. Haha, it's the easiest way for them to classify the music I guess since it's so varied.