Tensions run high on the Idol set

Tensions are high backstage at American Idol — and not between the contestants. New judge Kara DioGuardi is reportedly fed up with the way she’s being treated by Simon Cowell and Randy Jackson, and this week’s performance show was apparently particularly bad.

“She was so upset, she couldn’t hold it back,” a source tells OK! Magazine. “Kara was telling everybody, ‘I don’t care anymore. I’m going to quit!’ She didn’t sign up to be anybody’s punching bag.’ That’s what she feels she’s become.”