This isn't troubling!
The pop star was allegedly left livid after the contestant stormed into her dressing room and pulled a tantrum over her wardrobe - all in front of Joe McElderry!
An insider explains:
"Joe was stunned by it all. He was in Cheryl's dressing room when Cher barged in. She was in a right strop. Joe said he couldn’t believe how this girl talked to Cheryl and the lack of respect."
We think thousands upon thousands of other people would KILL to be in her position, and be a whole lot more respectful!
This kind of behavior is not going to win you any votes, CHer!
[Image via WENN.]