Singer and X Factor judge Cheryl Cole reportedly wears Invisalign braces at night to keep her dazzling teeth straight.

A source close to the Girls Aloud star revealed that she has been wearing the invisible braces at night to keep her teeth straight as she nervously awaits the news about whether she will be a judge on the American version of the TV talent show.

The Daily Star also reported that Cole will receive more teeth whitening treatments upon her return to Los Angeles in a bid to perfect her smile for her rumoured new job.

After admitting to wearing invisible braces in the past, the 27-year-old style icon has undergone a number of cosmetic dental procedures to give her a dazzling Hollywood smile.

The Daily Express revealed that Cole has the most requested smile in the country, with cosmetic dentists regularly performing procedures to create a similar pearly-white and glamorous look.