The 'Hold It Against Me' singer was said by US Weekly to be "coming undone" while judging the second season of the contest alongside Simon Cowell, LA Reid and fellow newcomer Demi Lovato.
Spears was accused of getting "extremely nervous and anxious" during auditions, with a source saying: "X Factor may lead her back into meltdown territory."
The insider added: "This is a lot of change at once for Britney. She's coming undone."
However, a member of Spears's team has since told Gossip Cop that there is no truth to US Weekly's article, claiming that the publication still chose to run the report when they were informed of this.
"[It's] a pathetic attempt at creating a story," the representative commented.
The 'Toxic' star came under fire recently when it was claimed that she walked out of her first X Factor auditions session in Texas, though this has been denied by both Spears and Cowell.
Spears is also alleged to have demanded a higher salary than American Idol judge Jennifer Lopez.