P.S. If you live outside of the United States, please tell me if the widget above works for you.
[THE FOLLOWING WAS WRITTEN AFTER I POSTED THIS]
Turns out that Amazon, like other selling services of its kind (and yes, I am an Amazon Associates member), only offers brief samples of the songs in question, not the entire song. However, if you haven't heard the song in question, these brief samples do provide a snippet of how the song actually sounds.