Cheryl Cole is set to beef up her personal security team in preparation for her book signing this week.

According to Metro, 'The X Factor' judge and Girls Aloud member is taking the extra precautions to protect herself before launching her 'Through My Eyes' memoir.

The singer was visibly left shaken and worried after she lost a ring when she was grabbed by a fan in June.

In her book, Cole has described friend Derek Hough as a sweetheart and frequent collaborator will.i.am as "a very special person". It has been claimed that she does not mention her ex-husband Ashley in the account of her last 12 months.