By Holly Gleason

The ABC series Nashville has been feeding high-quality music to Big Machine since it hit the airwaves in fall 2012—and music is a big part of what gives Callie Khouri’s prime-time drama its traction. Entering its fourth season, Nashville is watched by 6m each week on average, while Big Machine’s six soundtrack albums, two for each season, and various tracks have collectively sold 1.2m in TEA.

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