Since ITUNES and IPODS people can listen and download songs by artist they might not have listen to before.
To get an idea how strange my taste run. I had a mixed cd made years ago that had 4 songs in a row. The artist of these songs
Britney Spears, Metallica, Oasis, Chantal Kreviazuk
go figure..
I was at a show a few years back( benefit show) and Public Enemy was playing > These woman next to me could not believe that I was into Public Enemy. They were shocked I knew alot of the songs..

People are more open now in their music.. When you like more then one style you can truly appreciate the songs and artist more.