I mean, ummmm: http://www.stereogum.com/1867042/alunageorge-will-play-a-concert-in-minecraft/news/ EMC should do something like this.
There was a guy that was on mumble playing guitar and singing just prior to the save the castle event and he was extremely good. I really enjoyed it.
Well, I really don't know how they are going to sync the music together but you know, I am a old fart who knows what can happen.