On the heels of her Tuesday appearance on The Oprah Winfrey Show, Shania Twain stopped by NBC's Today show yesterday to talk about her life and her autobiography that just hit shelves, From This Moment On.

Regardng her newfound courage to talk so openly, Shania said, "It's a periodic change of heart, in a sense. It's a phase that I'm going through. It's a period of my life where I need to focus on [sharing]. I wouldn't say that I'll be an open book for the rest of my life and career, but it's something I feel I need to face head-on in the moment."

She added, "I am generally a very private person. I've probably been to closed up than what was good for me. I also feel that a lot of that was just a bit of fear and anxiety, worried about what people would think all the time, and get criticized for it. And now I'm at a point where I feel sharing and giving testimony to a lot of things I've experienced would do more good for others than it would do keeping it to myself, and it also forces me a little bit out of my comfort zone, which is necessary for this healing."