Brett Young, who just picked up his fourth consecutive number-one hit with "Mercy," has learned a lot about himself over the last couple of years.
He says the most important thing he's discovered is just how much he loves his job.
"I knew that I loved it, but you never know how much until you have some success and, B, it pushes you past what your breaking point was, because it would be really easy at sometimes to go 'this is too much'."