Semi - Drama ??? Help Me please?

I know this might be childish but please help me out . Okay well im on a dance team with 4 girls that are in charge of the team and I'm one of them . Well one girl that used to be in charge of the team wasnt chosen to be in charge because of something she did and well since we were in charge , she put us down and told us how bad we sucked at it and turned the members against us .Therefore we got mad and werent talking to her for awhile and we were thinking about kicking her off the team but today we had a carwash and everyone started talking to her again, i talked to her as well but i still dont trust her , what do I do when i feel like everyone will go to her since shes manipulated everyone into being on her side and i just dont know what to do about the whole situation . i know this is childish but please try to give me some good advice please ? :D