You might have heard that Bill Gates and Bono are buddies -- the two philanthropists, along with Melinda Gates, were named Time's 2005 persons of the year together -- but did you know that the U2 frontman crashes at the Gates residence when his band plays a show in Seattle?
That's according to a recent interview with the Daily Mail, in which Gates speaks candidly about wealth, family and sharing his fortune. He also hums the Bruno Mars song "Billionaire" to himself and may have let the cat out of the bag on Mark Zuckerberg's engagement (or perhaps not).
What else didn't you know about the world's second wealthiest man? Check out these five facts on the Microsoft founder turned philanthropist, Bill Gates.