If you were listening to NPR this weekend, you may have caught a fantastic segment of On the Media called "Charting the Charts" by Mark Phillips, airing on over 100 U.S. radio stations yesterday and Saturday. It's a must listen for anyone interested in music charts like Billboard's Hot 100, as Mark eloquently explores how the art of ranking artists has evolved, and where the evolution is headed from industry leaders like Robert Levine of Billboard, Chicago Tribune music critic and author Greg Kot, Chris Molanphy of Idolator, Eric Garland and myself. If you missed the show, you can listen to it here or below if you have Flash enabled, and many thanks to Mark for his excellent research and production - it was an honor to be a part of it.