For those wondering if Molly is just using a K&K by itself; no - she runs it through a ToneDexter, which is a floor pedal that processes sound through digitally recorded microphone "signatures." Sounds confusing, but check out this demo (by her):
https://www.youtube.com/watch?v=wEeNOPCffHo
I agree that Molly's clean and clear voice is refreshing, as I dislike exaggerated country twang most of the time. I'm from New Jersey after all.