AC/DC - It's a long way to the top - Live 1976

Simon and Garfunkel "Sound of Silence" in Central Park

Simon & Garfunkel - Homeward Bound (Monterey 1967)

Paul Simon & Willie Nelson - Graceland

Nice. My favorite cover of Graceland remains Allison Krause & Union Station - beautiful but gone from YouTube.

Graceland - Paul Simon Concert in Zimbabwe

Dread Zeppelin - Immigrant Song

and a really nice Elvis Presley/Peter Tosh duet cover of Stairway Heaven:

http://www.youtube.com/watch?v=zAgREeIOdLA&feature=related