The 19-year-old found fame on America's Got Talent in 2006 and has since had a worldwide hit with her debut single Happiness.
Speaking at In:Demand Live in Glasgow, she said to UK newspaper Daily Record: 'I think we all know Simon's decisions are always the best ones. I think he's right on this one and we are going to love the show.
'Everyone is talking about it already. I have been on different X Factors around the world so would love to do the UK and US ones.
'As for judging, maybe one day it would be kind of cool but right now I am focusing on putting my own music out.'