I was going with Snow White because Lucy Hale looks a lot like her especially with her new haircut.

At first I was gonna choose Snow White as my choice for which princess looks like Aria since Snow White does resemble Aria just like Ariel does. But I have chosen Ariel because she does resemble Aria the most more so than Snow White and Ariel's personality is the same as Aria's personality as jeangreyforever has said that she was always ditching the girls to be with Ezra just like Ariel was ditching her home to be with Eric. Along with what I've stated I can imagine Aurora as Alison and Ariel as Aria having a neutral relationship out of the group of girls just like Alison and Aria have. But having thought about my original choice for picking Snow White for Aria I think now that Snow White doesn't resemble Aria all that much.