These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Many country music fans are unaware that "Mercury Blues" is a pop standard from 1949, having been covered by The Steve Miller Band among others.
Or that "Summertime Blues" was recorded by several artists, including original singer Eddie Cochran and The Who.
"Song for the Life" was first recorded by its writer, Rodney Crowell, and had been recorded by several other acts.
"Tall, Tall Trees" was written by George Jones and Roger Miller, both of whom recorded it in the sixties.
"Little Bitty," written by Tom T. Hall, was originally recorded by him as well.
His version of "Who's Cheatin' Who" is far more well-known than Charly McClain's original.
Crowning Music of Awesome: "Where Were You (When the World Stopped Turning)", often considered one of the most truly moving and emotional songs written in response to 9/11. This song won the Grammy for Best Country Song for a reason. It also was named #1 on CMT's Top 100 lists for both "Television Moments" and "Songs of the Decade" (2000s).