Oprah Winfrey, Maria Shriver, Rosie O'Donnell and Lynda Carter are among those who have paid tribute to Barbara Walters following her death.The trailblazing journalist - who was America's first female evening news anchor - passed away on Friday at the age of 93. Sharing a photo of the pair together, Winfrey paid a touching tribute to her "powerful and gracious role model"."Without Barbara alters there wouldn't have been me - nor any other woman you see on evening, morning and daily news," Winfrey wrote."She was indeed a trailblazer."