Simon Cowell The Pecs Factor

5/14/2012 11:15 AM PDT

Simon Cowell -- The Pecs Factor

Despite snagging Britney Spears and Demi Lovato for "The X Factor," former "American Idol" honcho Simon Cowell has hit a new low ... cut top.

While arriving to the "Britain's Got Talent" afterparty at the Dorchester Hotel in London last night, the 52-year-old mogul -- and his pack of Kool cigs -- nearly had a nip slip as his severely unbuttoned shirt showed off his sexy hairy man-bosoms.

Forget about all those sexy pop princesses and their outfits, Simon is breast in show.