Cowell confirms Spears spot on 'X Factor'

Simon Cowell has confirmed Britney Spears will appear on his British talent show 'The X-Factor', admitting she's the "number one booking in the world".

Spears will perform on the show to promote her comeback album 'Circus' and the music mogul, who has always been a big fan of the 'Toxic' singer, can't wait.