Irish rocker Bono says he\'s not \"richer than any Beatle\" even though his share of Facebook was valued at $1.5 billion after the company went public Friday. NME.com said Bono became the world\'s richest musician after his 2.3 percent share of Facebook spiked in value to $1.5 billion when the company went public. Bono bought the shares through his investment group, Elevation Partners, for $90 million in 2009. Friday\'s development meant Bono surpassed former Beatles band member Paul McCartney as the world\'s richest rock star since McCartney\'s fortune is estimated to be worth around $1.05 billion, NME.com said. But Bono played down the report in an interview with MSNBC, explaining the shares belong to his investment group, not just him. \"Contrary to reports, I am not a -- this boy is not a billionaire or going to be richer than any Beatle. … That\'s just a joke,\" Bono said. \"We invest in other people\'s money, in pension funds,\" Bono said. \"We do get paid, and that is a good thing. … I\'m blessed, but you know, I felt rich when I was 20 years old and my wife was paying my bills. Just being in a band, I\'ve always felt like this. I got interested in technology because I\'m an artist, I\'m interested in the forces that shape the world -- politics, religion, the stuff we\'ve been talking about today. Technology is huge. I wanted to learn about it.\"