Following the announcement that L.A. Reid will be vacating his spot on the judging panel, Simon Cowell is reportedly trying to recruit Rihanna to join the show. Simon is allegedly spending the holidays trying to persuade the superstar and is letting her choose if she wants to work on the American or UK version. Simon Cowell wants Chris Brown and Rihanna to judge The X Factor. A source tells the Sun, ''Simon is a huge admirer of Rhianna and knows she's star quality. As well as her bringing an aura to the panel thanks to her standing in music, she is also feisty. Adding Chris to the panel will also certainly create a talking point.''