The headline-grabbing music story of the week isn't on the Billboard chartsit's the U.S. debut of Spotify. With the streaming-music service less than 48 hours old here, it's a bit too soon to analyze what songs are getting the most play on its celestial jukebox and why.
Spotify's top tracks (left) and albums on Friday, July 15.
How do I know? Because we've been living through the Digital Era on the pop charts for about six years now, and the changes have been seismic, arguably bringing about our current four-on-the-floor dance-pop radio boomlet almost single-handedly.More »