Demi Lovato is reportedly the ideal choice as the fourth judge on the next season of X Factor USA.

The 19-year-old performer is the front runner to join Simon Cowell and LA Reid on the judging panel of the talent show.

TMZ claims that although she hasn’t yet received an offer, studio executives have singled her out as the favourite.

Other stars in the race for the coveted job are Miley Cyrus, Avril Lavigne, LeAnn Rimes and Fergie.

Britney Spears is said to be close to signing a $15 million deal to take up one of the two vacant spots but nothing has been finalised.

Demi is enjoying a resurgence in her career after taking time out to go to rehab for her eating disorder and emotional issues.

She also hit the headlines for allegedly hitting a female back-up dancer in the face during the Jonas Brothers concert tour last year.

Demi would bring with her a very strong fan base including her nearly seven million Twitter followers and a younger demographic for the show.