Britney's 'Amazing' Live Debut On The X Factor USA

SPOILER ALERT: You may wish to avoid reading this story if you are waiting to watch The X Factor USA on British TV.

Britney Spears has made her live debut as a judge on The X Factor USA, and she described nearly all of the 16 finalists in glowing terms.

Britters, who could clearly be seen to be wearing earplugs, used words like "amazing", "incredible" and "entertaining" for all but two of the contestants - taking an early lead in the "most-positive judge" stakes.

And Britney even moulded one of her teenage charges in her own image, dressing young Simon Cowell said: "We have had a name change, for boring reasons. They're now 1432, which means 'I Love You Too'."

Digital Spy reports that a group called The Lylas - composed of Bruno Mars' sisters - had complained that the name was too similar to their own.

Britney appeared on Jay Leno's show earlier this week.

CHECK OUT PICS OF BRITNEY, DEMI & MORE FROM THE X FACTOR USA 2012 HERE!