An addition
I just had the best 10 minutes of my work week. Richard Christy is a freaking GENIUS. Hope you enjoy as well -
YouTube - Robin Quivers Funny Songs 1
I just thought I would add that while Richard Christy is a freaking genius, a lot of the parody songs featured were done other people...
As far as I can tell from this set of clips, only the Eddy Grant, Travolta and Newton-John, and the Dead or Alive songs were from Richard.
The Haddaway song sounds like Sal, maybe Richard helped him as well?
The Timberlake and Guns N' Roses song was by Dan the Song Parody Man(the true unsung Genius)
That's as far as I could figure it.