Brandon I don't know who the hottie is, but she's not the actress that played Nellie Olsen.
The woman that played Nellie looks far worse, and much older:
http://en.wikipedia.org/wiki/Alison_Arngrim Quote:
If we are referring to Nelly Olson, here she is as a brat from Little House on the Prairie:

Here she is all growed up:

I am willing to pay $100 if she will recreate the photo with her tongue sticking out.