Eric Cartman - Come Sail Away -- this makes me laugh so hard every time
Also, for more inspiration (I.E. not just the top songs from 1977, but some albums as well), see
here.
Also, there's an album called "Animals 2001" by Out Of Phase -- it's probably my favourite "album tributes" I've heard. I recommend their version of "Pigs (Three Different Ones)", but "Sheep" is good, too.
There's gotta be a version of "Sorry Seems to Be the Hardest Word" out there that doesn't suck.
Oh, and you gotta put some Me First and the Gimme Gimmes on there. Offhand, they've done: Come Sail Away...oh, I can't figure them all out, do your own homework.
google music link