I think that her songs are powerful. Not just in the whole earworm kind of way but also in the messages that she tries to put forward. I say tries, because I highly doubt that everyone listens to them for the messages, but the songs themselves are worth listening to — if only for their unique or interesting musical sound.. She's a success in many ways and I think something should be said for that — afterall she's no tween musical sensation. Sure she's not my favorite artist, but I do kind of like paying attention to what comes from her.
Interesting question, really.