Playing For Change is a music project that has musicians from all over the world singing the same song, then they splice it together into one multi-artist song:

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Playing For Change | Peace Through Music (http://playingforchange.com)

You haven't learned your lesson about 'change' yet?

I liked this idea better when they did it 24 years ago (http://www.youtube.com/watch?v=k2W4-0qUdHY).

This is not much different from how artists commonly "splice" individual tracks together; only now they're a few miles apart.