is tired of being nagged by Simon Cowell
The 19-year-old singer admits the 'X Factor
' chief tries to keep her and fellow panellists L.A. Reid
and Britney Spears
in line during filming of the talent search contest, but she isn't afraid to stand up to his bossiness.
She said: "Simon's great, but he nags on me so much that I don't know if I can take it any longer.
"I'm a brat. ...