3. He never graduated high school.

At the age of 15, Keith Urban dropped out of high school to pursue music full time. While he likely wouldn't recommend that to kids these days, it did work out for him eventually. He was a guitar prodigy in his home country, and by the time he was a teenager, he'd made a name for himself. Education -- and specifically music education -- is something Urban actively promotes. He was an initial supporter of Music Makes Us, a program which works to raise funds to make music a larger part of the curriculum in public schools by providing instruments and other resources. Recently, he talked about the program and his efforts.