Simon Cowell ordered Britney Spears to clean up her look for TV

Sources from the US show say the unkempt singer rolled out of bed and rocked up to a taping without a bra early on in the series, prompting Simon to lay down the dress-code law.

"It was made clear she is expected to be impeccably dressed and made-up for the show. And none of those ragged hair extensions," an on-set source told the New York Post.

X Factor reps have denied reports that Brit was also ordered to sack her stylist, but apparently she's been looking fabulous ever since Simon's style intervention.

Fix yo' weave! Simon Cowell doesn't want Brit's dodgy hair extensions to get any airtime.