Being swamp this week at work, I can't really go in depth as I want to on this subject. Prog Rock is a genre of Rock where artist attempt to create high art for Rock, putting it into the realm of opera and classical music. Bands like Pink Floyd, Metalica, Zeppelin, etc. have all experimented with attempting to create high art with Rock music. So I decided to search for a couple of artist who if not trying to forum some sort of "high" art, but walking the thin line between American Musical genres. Enjoy.
Lupe and Matthew Santos Accoustic "Superstar"
Mos Def use of classical drums for "Quiet Dog"
The Rolling Stones remix with the Neptunes
Run DMC and Aerosmith