What's the Name of That Book??? discussion

i hope yall can help me. i read this book awhile back and i cannot remeber the title. it was about a group of superheros who had been exposed to a gas making them gain powers related to what they were doung at the time especially if it was stressful. one girl was not really doing anything so it made her grow till she was gigantic. i think there werevof them who joined togetheras teenagers under a goverment program to fight the bad guys. but the team was disbanded and they all went back to normal life (except the girl who was gigantic) till one day someone starts killing them off. this is where the story started. any help on this would be appreciated.

Carly, adding some more plot detail to your topic header will help searchers find your book.

For example, children's? YA? Adult?

What year did you read it?

Series or standalone?
Set any place?
Cover?