On the outside, country star Carrie Underwood appears as an unstoppable force of nature. The woman makes hit songs with every album release. She is the poster woman for the country genre and owns every country station out there. However, life for Underwood hasn't always been roses and rainbows. Even since winning "American Idol" back in 2005, Underwood has endured hardships both professionally and personally. Now the country singer is opening up with the life lessons she's learned throughout her music career.