So which of the models from cycle 13 of ANTM look the prettiest (see details for link of photos)?

Here are the models for cycle 13. I believe they are all under 5' 7.
http://www.buddytv.com/slideshows/americas-next-top-model-cycle-13-meet-the-models-36222.aspx?slide=1
I think Ashley, Brittany, Courtney, and Erin are the prettiest in the "conventional" sense. Some of the others are more unique looking than just gorgeous faces. Of course, they will get make-overs probably on the show so they may look a lot different. I can't wait for the new season though! By allowing shorter girls, Tyra had a lot more beautiful girls auditioning since the average American girl is 5' 4.

They are pretty.

I have no faves since I rather wait until I see them in action. Because beauty goes beyond a pretty face and some of the typical beauties end up sometimes being total bores and annoying.

It was about time to put on the show regular size gals. Since the tall ones are usually not that good looking anyway.

Courtney and Erin but you shouldn't judge them on their looks but by their talent