Simon Cowell often is known to make other people feel embarrassed but now is copping a taste of his own medicine.

Cowell is facing mockery from X Factor viewers in the UK after they spotted what appeared to be a strange wardrobe malfunction.

The music mogul was sitting barefoot on a sofa with Spice Girls Mel B and Emma Bunton, watching contestants sing.

Simon Cowell's big toe seems to be the centre of attention. Photo / Twitter
Simon Cowell's big toe seems to be the centre of attention. Photo / Twitter

However, fans were more interested in something unusual which appeared to be poking out of his jeans.

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One fan posted a screenshot of the moment on his Twitter page, and made a joke at Cowell's expense.

"Has Simon Cowell had a wardrobe malfunction or is he enjoying these auditions a bit too much?" the viewer wrote.

Another added an eggplant emoji and wrote: "So....Simon Cowell has had a bit of a wardrobe malfunction."

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A number of viewers hopped on Twitter to joke about the humorous moment, but several took a more rational approach and insisted it was just his toe.

One wrote: "Omg it's his toe... dirty minded people," and another added: "Nope! It's big [toe]...he can't be that careless on national telly!"