Tell us about a particularly stressful moment in your career.

I remember getting into a cab to go sing at the Super Bowl, and I had tennis shoes on. I didn't have my shoes on for the Super Bowl performance, and the FedEx truck pulled up behind the cab with my shoes. I've had so many memories of just, how in the world did I pull it off? It was by the grace of God that I got there, and that's the story of my career.