There are a few specific chord progressions that show up again and again in popular music. Across hundreds of hit songs, the same basic musical formulas have been used by artists ranging from Lynyrd Skynyrd to Lady Gaga, and from Bob Marley to Blink-182. So where did these musical tropes even come from, and what makes them so enduring? Featuring music journalist Jennifer Gersten and comedic musician Benny Davis. 

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