Newly appointed US X Factor judge Britney Spears has stirred up her first bit of controversy since returning to the public eye, as she reportedly walked off set during the filming of the first episode of the US version of the popular talent show.

The singer lasted just 30 minutes into her first day as a judge before walking off after a hopeful butchered one of her songs during a rendition of 'Hold It Against Me'. The 'Toxic' singer the missed four more contestants, being treated to shouts of "where's Britney?" and even jeers from the audience of 4,300 before she returned to her seat. Following the walk-off, the singer took to Twitter to hopefully put to rest rumours of dissatisfaction with the show already, Tweeting: "LOL was just taking a little break people. I am having the best time."

Britney reportedly looked nervous throughout the filming of the show, although did seem to come to grips with things as filming carried on. However, reports of her fragility may not be the biggest concern for the pop diva as fellow newcomer to the show Demi Lovato looked to take to her role as judge like a duck to water, teasing fellow judges Simon Cowell and La Reid along the way.