Teresa Palmer was incredibly beautiful in this.
First off, I feel like I should note that I really enjoyed the movie itself. It was a funny, sweet film and it took a very different approach to the genre than we normally see.
That said, Teresa completely stole the show for me. She looked so naturally, absolutely gorgeous in every scene; I just could not get over how lovely she looked. She's been beautiful in every movie I've seen her in (hell, I even watched I Am Number 4 solely because she was in it) but she was especially notable here IMO.
Let a little insanity into your life.