Help with book characters, the personality and the looks?

[Courteney]

Im writing a book about 4 girls in boarding school. I have their personalities in my head but not their looks? Could you please tell me how they look in your head and i have pictures to choose from if you need help!

Amelia Windsor: Main - (Mia , Mi Mi) 15
A smart girl full of ambition! She's very innocent but does like to have a sneaky drink now and then to feel like a teenager. She's pretty but feels like no one would like her.


Elizabeth Darcy: (Beth, Bethy) 15
The rebel of the group and she's beautiful! She loves to party with her friends and get with every boy in the school. She's smart but never applies herself to the work.

Maddison Grey: (Maddie) 15
She's peaceful, loving and artistic. She always has her side of the room filled with art and a photo wall. She is more of a tree hugger than well the rebel of Beth.

Emery Linnington: (Emma) 15
Cute and funny. She has long lush legs which Mia thinks is why she had so many boyfriends. Always there for her friends.

Help please with how they look! All i have is Emery's long legs! Heres some ideas if you just feel like mixing and matching:

1:
https://twitter.com/CourtsWaldron
2:
http://www.google.co.uk/imgres?um=1&hl=e...,s:0,i:358

Okay i gave up on them but thanks!