Funky Town by Lipps Ink
I'd have to say "Run Joey Run" by David Geddes. It's so bad I couldn't find it on youtube!
...but I did find it here:
http://popup.lala.com/popup/360569449464813790
Not bad Snakes&Ladders, but I have one that is even worse.
Raspberry Beret by Prince,,,who should have changed his name to Serf after that horrible song.