See video below
A lot of guys might celebrate entering their mid-fifties by going to a rock concert--but Bill Gates isn't most guys, and his celebration was anything but average.
U2 singer Bono not only sung Bill Gates a rendition of "happy birthday", but led the entire stadium in song. Watch it below!
"Without him, and without his business, we just wouldn't be where we are today. It's his birthday today. Bill Gates is in the house," Bono said, before leading the cheering crowd in a rendition of "Happy Birthday."
"A pretty sweet birthday salute," says our former Seattle P-I colleague John Marshall, who was there and filled us in on what happened.
See Bill Gates through the ages here!