The audio series, which you can hear for free online, is called "All Songs Considered" and looks at famous hits that "persist in culture," classics you mostly know from the past, but constantly seem to still hear on the radio. 

And it's not restricted to either oldies or more modern fare. This week, they looked at the classic "Crimson & Clover" by Tommy James & The Shondells, but have also covered more modern fare like Neil Young's "Rockin' In The Free World" or "Wolf Like Me" by TV On The Radio. 

The show has dozens of podcasts online, and the tunes examined go all the way back to "The Christmas Song" by Nat King Cole and "Summertime Blues," the Eddie Cochrane classic. 

You can find the entire list here.