The Slow Hit Movement: Year-Old Songs On The Pop Charts : The Record : NPR

I'm a chart geek; I love it...

The Slow Hit Movement: Year-Old Songs On The Pop Charts : The Record : NPR: What makes a song catch on months, or even a year or two, after its initial release? Obviously there is no formula for giving an aging single the boost it needs to become a smash — if record labels knew what it was, they'd try to bottle it.