An estimated 2 billion people watched the Live Earth concerts on Saturday night, as 9 countries on seven continents played host to the biggest gathering of stars this side of Andromeda. Alicia Keys, Cat Stevens, Sting, Keith Urban, Foo Fighters, Duran Duran and even Genesis were wheeled out with their two cents, in an attempt to convince the extensive audience that the world needs to take some drastic action against climate change, like now, man.

Exactly how staging a series of energy-hungry concerts featuring a cast of wasteful rock stars was going to help didn’t get explained fully. And Madonna’s ingenious observation that "If you wanna save the planet, jump up and down!" was no less stupid than suggesting you can protect yourself against malaria by wearing a large hat.

But the message got out and everyone had a good time. Al Gore made the Americans wish they’d voted for him instead of Bush, Andrew Stockdale talked up the financial benefits of catching the bus and Leonardo DiCaprio begged ‘won’t somebody please think of the children?’

But it was Spinal Tap who injected the humour this event desperately needed. Here is a clip documenting the early stages of the band’s reformation, which finds lead man David St Hubbins in a studio space catering for both his record and colonic irrigation businesses.

“I’ve always been against devastation of the planet” he tells his interviewer.

Hey, it got Spinal Tap back together so it can’t be all bad.

Think that was funny? Then click here to see Madonna's laughable Live Earth theme song in all its pathetic glory. Please, let's start burning rockstars instead of coal so we can save both the planet and the music industry simultaeneously.