Well I don't think she's that good actually. Her singing style is derivative and she has an unjustifiably big ego. I see these two aspects as faults, not fatal ones but still faults, that prevent her from progressing from good (which she undoubtedly is) to great (which she most assuredly isn't).   To be utterly subjective and to give my personal opinion which I know is of no interest to anyone and which informs absolutely nothing, if she comes on the radio I have to go through approximately ten seconds of severe buttock-clenching before I can get to the "off" button.