See the Cool Interactive Map for iHeartradio's 'United States of Music'

iHeartRadio has launched a cool interactive site called the "United States of Music," which shows the best music of the year . . . by location . . . and by DAY.  It's based on the iHeartRadio streaming service and radio airplay.


 You can get a lot of niche data by playing around with it, but it also offers a generalized NATIONAL list of the top artists and songs for the ENTIRE year. 


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