The 27-year-old is currently a judge on the UK version of the show but it is claimed she will be joining Simon Cowell when he takes the show to the States next year.
A source said to UK newspaper The Sun: 'The execs love her good looks and the way she wears her heart on her sleeve.'
It is claimed she has been handed a one-year contract to become a judge on the show and boost her career in America.
Bosses from the show reportedly came to watch her on the UK version of the progamme on the last episode and were impressed with the way she came across.
A spokesman for the talent show has reportedly refused to confirm the deal.