Kathie Lee Gifford exudes positivity and light, but fans will soon see another side of her.The 67-year-old TV personality gets candid about the darker moments in her life in her new memoir,. In the book, she briefly touches on her past sexual assault and digs deeper into when she thought her marriage to the late Frank Gifford hit rock bottom.As Kathie Lee tells ET's Rachel Smith, she originally «didn't want to» revisit Frank's infidelity.