Thanks to modern technology, one can do things that one could formerly only dream about, such as taking a pop song and changing it from a major to a minor key and vice versa. Major keys tend to be used for upbeat songs while minor keys are favored if you are trying to achieve a more melancholy sound.
Via Rob Beschizza, I came across what such a transformation sounds like when you do it to one of the best known John Denver songs, Country Roads.
For those not familiar with it, here is the song in its original major key.
Here it is after the sound technology wizards have transformed it into a minor key. The result is … interesting.
I prefer the original version.