Watch Sarah discuss her relationship with Princess Diana
Just months before the 1997 car accident that took her life, Diana gave Sarah some advice about life as a former royal. "She said, 'Remember, Fergie, when you're at the top of the pedestal, you can fall off. It's when you're at the bottom you can grow,'" Sarah says. "On April 29, I again thought that. I thought, 'Well, now, I went to the gutter. Now I can grow up as Sarah, and I can begin to really get to know Sarah.'"