What Kind Of Dog?

I just got a new puppy about 2 mo. ago, and no one (not even the vet) knows what kind of dog she is. All they know is that she is a mix. Her name is Molly (not that that would matter)and she is 23 pounds, and the vet said that is all she is going to grow. Give me you best guess as to what kind of mix she she is.
Thanks!!!!!!!