Demi Lovato 'Completes X Factor USA Deal'
Singer-songwriter reportedly confirmed to join Britney on judging panel...
Britney was recently reported to have agreed a £9.3m deal for one season as a judge - and the fourth judges' chair will be filled by music exec LA Reid once again.
TMZ claims that the show's schedule will be planned around Demi's existing touring commitments - as she will be on the road this summer.
An official announcement is predicted today.