Of course, the original plan for Dancing in the Street was to have Bowie and Jagger singing it as a duet over a satellite link-up, with one in the US and one in the UK (can't remember which). It was their idea to do this, but when they spoke to some technical people they discovered it would be impossible to do with the delay. Such a shame, it would have been so cool for them to be literally "calling out around the world"...

Of course, these days it may be possible to do it over a high-speed connection...

Project cancelled
Tumbling central
Red Money