Redlemon,
You'd probably get a kick out Jonathan and Darlene Edwards:
http://corinthianrecords.com/intv.htm
Unfortunately, I can't find any clips of their stuff on the web. But I do have two of their albums. It's amazingly well done. It's easy to sing and play badly if you don't know how to ... but it's an entirely different thing to make it "sound" like you are bad when in fact you are an accomplished musician.