I cant tell in the pic, but maybe it's just my eyes-does she have greenish legs? If so, she's a very pretty Easter Egger, I'd say. Several people here on BYC raise Ameraucanas and/or Araucanas and could tell you their opinion. White is an accepted color for Ameraucanas, but her legs do not seem...
Araucanas and Ameraucanas are true breeds. Easter Eggers may carry the blue egg gene, but they do not fit the standard of either of those breeds. Araucanas and true Ameraucanas are relatively rare, actually.
http://creefarm.fateback.com/ameraucana.html
Araucanas are rumpless with ear tufts...