Britney spears is set to perform her new single womanizer on the X FACTOR, its been over 4 years since the troubled singer graced our s s, but series boss simon cowell is said to have secured her to sing on a show in december. Everyone is thrilled. A tv source said. To have britney involved is a massive coup. They expect ratings to go through the roof when her performance airs. Past stars to appear on talent show include westlife, take that, kylie minogue. Let see what happens next.