This quote means that you dont know what someone is going through, you only know what you hear, and those things could be made up, so you should never judge someone.
This song demonstrates the girl, because in the song its talking about someone who keeps to themselves and is scared to be who they really are.
This girl may look sad, but inside she may be super happy and just be pretending to be sad for a picture.
This represents the story walk this way, because you think she is a normal girl, but you later find out she bops, and this picture you look at the girl thinking shes ugly until you see the other side of her.
Stay open minded because something might look one way but there could be a whole other side to it you haven't seen yet.
In the story walk this way, Brittany would represent the girl, because when you meet her you will probably think she's just a normal girl until you find out the other drag racing side of her, you will think totally different of her