04/26/1999 AT 12:00 AM EDT
Julie Andrews says she is in "some kind of denial" about her inability to sing since throat surgery in 1997. "I went in for a routine procedure that I was told would not be threatening to my vocal chords," the Oscar-winning actress ("Mary Poppins" and "The Sound of Music") told ABC's Barbara Walters. "Since then ... I've just been unable to sing," the star said. But Andrews, whose husband director Blake Edwards first revealed his wife's inability to sing in an interview last year, said she remains upbeat. "I have to be optimistic," she said. "Because to not sing with an orchestra ... to not be able to phrase lyrics and give people that kind of joy, I think I would be totally devastated." Asked whether she is considering suing after having been told the operation was routine and she "would be singing just as well or better than ever," Andrews said. "Believe me, it's under consideration."