<a href="http://www.youtube.com/watch?v=kVQMOKTnaAE">"Bippity Boppity Boo", "Magic Moments", "Drift Away" - John Denver</a>
From the John Denver Show.

<a href="http://www.youtube.com/watch?v=zERmbLLMEMw">"Fire and Rain" - James Taylor</a>
From a concert in 1970.

<a href="http://www.youtube.com/watch?v=VWqOv_KS_D0">"Talking Vietnam Potluck Blues" - Tom Paxton</a>
The only YouTube video of the ramblin' boy, but this is a really funny song written in the talking blues style popularized by Woody Guthrie.