As if his bank account wasn't big enough, Bono is set to add a few more zeroes to his bank account as a result of an investment his company Elevation Partners made in Facebook in 2009. Bono pumped $210 million into Mark Zuckerberg's company and recent valuations have placed Facebook in the region on $65 billion, meaning Bono's share of the business is now worth in the region of $975 million. Not only that, the recent 360 World Tour that U2 embarked upon raked in a massive $736 million making the band the highest earning band in the world, ahead of Bon Jovi, Elton John and Lady Gaga. Not bad for a year's work.