From the debutante annoyance of the shrill 'Tuesday Night Music Club' to surpassing expectations with the non-sophomore slump of the excellent 'Sheryl Crow' to the ambivalence and skill of 'Globe Sessions' - well, it's been downhill ever since. She's long ago morphed from a debutante to watch to a major nuisance. She's not only lost her voice, but she's here to prove that there's a cliché born every minute, and we're the suckers buying into it. She's never been more formulaic or mediocre. My grade: C-