She’s stronger than yesterday–and $15 million richer too. Britney Spears has signed a deal to join Simon Cowell as a judge on The X Factor, after months of negotiations. The pop star will make $15 million for the season. Cowell got rid of last season’s judges Nicole Scherzinger and Paula Abdul, in an effort to boost the show’s ratings for Season 2. There's still one judge’s seat left to be filled, and Cowell is reportedly considering a long list of names, including pop singers Miley Cyrus and Demi Lovato.