Lambeth, England (ES)Simon Cowell has lost $20,000 in a bet with LA Reid. ‘The X Factor’ mentors placed the wager at the beginning of the second series that one of their act’s would be crowned the winner, which would see the victorious judge win $20,000. A source told TMZ.com that the British judge lost the bet when LA’s act Tate Stevens received the highest number of public votes and announced the champion.