Forget about being the frontman for one of the biggest bands of all-time; Bono also owns 2.3% of Facebook, meaning today's IPO will earn him a ridiculous amount of money.

Bono is the co-founder of a private equity company called Elevation Partners.  In 2009, they bought Facebook shares for about $90 million.

Since Facebook is currently valued at over $100 billion, this makes Bono's share worth over $1.5 billion and puts him well above Paul McCartney, who WAS the world's richest rock star.

Sir Paul will have to settle for being the SECOND richest rock star. Poor guy.

Here's what approximately $2,538,949,500.00 looks like.