20) "Macho Man"--Village People: At first I chose "Y.M.C.A." and then I thought "In The Navy," but then "Macho Man" came up and I realized these guys were single-handedly determined to ruin music as we knew it. And they succeeded. Except that nowadays this doesn't sound so bad because the stuff on the radio is actually quantifiably worse.
17) "Me And You And A Dog Named Boo"--Lobo: If this song doesn't make you want to lay down and take a crap in the grass nothing will.
I think every decade has its cheesy tunes. The 60s and 50s certainly had tons of them too.
Let's not forget rock ballads with sappy lyrics intended for women only.