Jamey Johnson's "In Color" would be higher on this list of the Top Country Songs of the Century if it was based purely on artist and songwriter opinion. It's the most frequently named song, or at least one of two (the other is still to come).
The Kicks 105 Goldmine show on Saturdays features great classics like the 2 songs that hit #1 for Willie Nelson on this day in country music history. Technically they are Willie songs but the first of the two was performed by Faron Young! "Hello Walls"