The cover image is my least favorite from her photos, but it's still a somewhat striking image and not a bad cover overall.
I'm not a fan of Ke Dollar-Sign Ha (free cookies if you get the reference!), but I don't think she's inappropriate for the cover. She's from Tennessee (I think? Anyway, if she is, that's very "Americana") and her sudden rise to fame topping the charts of popular American music, invading the pop culture scene, etc..... it all makes her seem kind of a fitting choice. Besides, it's not as though she's overused on fashion magazines. Truth be told, even though I think her music is downright atrocious, I wouldn't mind reading about her.