*rowr*
Yep... she's perty, alright.
Her name is Cheyenne Kimball (she's 19), and after a quick Google search, it appears as though she's actually quite famous.
http://en.wikipedia.org/wiki/Cheyenne_KimballHere's a pic of her playing guitar and it's strung normally...
...so I think it's safe to assume that she plays it like that since it's easier to learn the chords because a mandolin is essentially "strung backwards" for guitar players already (GDAE).
I remember picking up my buddy's mandolin one time and started strumming a bunch of chords on it and he was like, "When did you learn how to play the mandolin?!?!?!"