to me Norah Jones was a fad (again and again) that can easily slip back up and make me fall in love with her voice again, but I don't listen to her more than a few hours a year. She is very talented, versatile, down to earth, and never takes herself too seriously, a lovely person with a great voice.
I tried Diana Krall a dozen times, and failed, I don't get it. Never enjoyed a moment of it.