The Clique Movie question?

Question

Who is the girl on the bottom left and the girl on the top right? I thought bottom left was supposed to be Massie Block, and top right was Kristen, but after Claire leaves in the clique trailer, the girl on bottom left comes out and says she doesn't have to go, and that doesnt seem like something massie would say.

http://s272.photobucket.com/albums/jj177/shaycullen/?action=view&current=TheClique-1.jpg

Answer 1

The Blonde is Claire and the Brunette is Massie. Alicia is far left and kirsten to the right