Her name is Maddie Ziegler. She is from around Pittsburgh,PA, I think, and was on Dance Moms or some such show.
https://www.youtube.com/watch?v=G8EmmhP4Cyk
https://www.youtube.com/watch?v=G8EmmhP4Cyk
"For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring." - Carl Sagan