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Lookin' good sir!

Simon Cowell stopped by Britain's Got Talent in London today, and the X-Factor judge wore his go-to outfit of a cashmere sweater and jeans. We couldn't help but notice that the super rich Brit has lost some weight recently. Maybe all that canoodling with bikini babes in St. Bart's over Christmas left no time for snacking?

The U.K. singing competition's other judge David Walliams apparently noticed the change in Simon's appearance too, because apparently the two got into quite a war of words during auditions. Walliams teased the music producer about having "a lot of work done" to make himself look younger, which wasn't warmly received!