I worked in the music industry for a long time.
Believe me when I tell you that the worst song of all time is a song you've never heard. A woman recorded a CD in a bathroom recording studio in her mansion in Rancho Santa Fe, CA. The quality of the recording was actually pretty exceptional, and rivals a lot of what I've heard coming out of the high-dollar studios in New York and L.A.
But the songs were absolute garbage. I don't even wish I could remember the name of the song, because not remembering it is a pleasant reminder that I've successfully scrubbed the horrid memory from my mind.
As bad as a lot of these songs being mentioned are, they're perfection compared to some of the tripe people put forth...