When I saw the title of this thread, I had to quit lurking and give my two cents. I'm an avid collector of 80's music and some of your posts are killing me. While a lot of the music of the 80's was cheesy, it's still so much better than most anything out today. You can have a big laugh Team Casey, but the 80's are pretty much all I listen to.
That being said, one of the songs that stands out as being one of the worst of the decade was "The Girl Is Mine" by Paul McCartney and Michael Jackson. Those two fighting over a girl? I remember one of Paul's spoken lines: "C'mon Michael, we're not gonna fight now."