Best Collaboration?

Yesterday I was listening to 80s on 8 on the satellite radio in my car. I heard Walk This Way by Run DMC and Aerosmith. "This has to be the best musical collaboration of all time." OK. So I am prone to hyperbole when feeling nostalgic for the 80s, but it is pretty cool--at least I think so.

Usually when I write a music post or pose a question about, for example, the best album title or all-time coolest re-make I've secretly already made up my mind and will never be persuaded. But this time I'm really asking. What do you think? Let's decide this once and for all.

You might think, Ebony and Ivory by Paul McCartney and Stevie Wonder. But I thought Paul McCartney's duets with Michael Jackson were a lot more fun. Who doesn't love Say Say Say?(Communists.)

For a collaboration to be the good, there has to be something really satisfying in the pairing. The best is when former enemies come together. The worst is when has-been desperately embraces up-and-comer. The song also has to be good. The quality of the song can outweigh, in my opinion, a lackluster pairing.

Don't Go Breaking My Heart by Elton John and Kiki Dee is pretty quintessential. And what about Moby? Do we need to distinguish between a duet and a collaboration? I don't know. You tell me.