LOS ANGELES, CALIFORNIA, UNITED STATES OF AMERICA  (HOLLYWOODTV) - Lead singer Bono of legendary rock band U2 is quite possibly the world's richest rocker today after Facebook's initial public offering this week turned an initial investment of $90 million back in 2009 -- or roughly 2.3 percent of the company -- into many times that amount after the social network went public on May 18, 2012. It is unclear how much of the riches Bono will split personally with his company, but it is evidently likely that Bono may now top Paul McCartney's riches of $1.05 billion.

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