Hm, I think I would like Sigur Ros less if Enya was involved.

Don't knock it til they try it lol. Who knows what any of these would really sound like if they worked together on something? Could be amazing, could be terrible.

My favourite mash-up has to be at 2:27 into this video. Yael Naim + Eminem = amazing.

wooten and ben harper would be cool

jason becker and les claypool

Chris Cornell and and jimi hendrix on guitar

Maynard with Jerry Cantrell

I could spend hrs on this one lol

Elvis Costello and Chris Hillman. It's weird how it's never happened, as he's just about the only one of my favourite country rockers that Costello's never collaborated with.

David Sylvian and Scott Walker would rock my little socks too.

Oh, Bowie and Bat For Lashes could be pretty grand too.

Agree

Burial and Audiokonstrukte sound to me like they would make perfect music together. I feel their separate styles would compliment each other perfectly, and I already know Burial can work well with lots of musicians... If only there was some way to make it happen :/

For some reason that I'm not really sure of, I feel like Beck and Big L would be absolutely sick as well.

There has already been a dynamic duo. Soul mates.