Reigning Miss USA Sarah Rose Summers is going full "Mean Girls" at the Miss Universe competition by openly mocking Miss Vietnam for not speaking English.
The pageant competition goes down in Thailand in a few days -- but Sarah, Miss Colombia Valeria Morales and Miss Australia Francesca Hung decided to go on social media to gossip about other contestants. Watch ... Sarah took a nasty, xenophobic cheap shot at Vietnam's H'Hen Nie.
Clip - Aim - Miss - Cambodia
She wasn't done there ... in another clip, she takes aim at Miss Cambodia,...