The 13-year-old's return to the show was confirmed by Simon Cowell, who simply said: "We believe we made a mistake with one act" moments into Wednesday's (November 7) show.
Cowell also revealed that girl group 1432 - who were formed under the name LYLAS - have been renamed once again, and will be known as Fifth Harmony from now on.
Wednesday's show had the theme 'Songs from the Movies', with contestants taking on tracks recorded for film soundtracks by artists such as Whitney Houston, Michael Bolton and even X Factor judge Britney Spears. Move through a gallery from the broadcast below:
Copyright: Fox Ray MickshawThe X Factor USA's next results show airs on Thursday, November 8 at 8/7c on Fox, and will feature a guest appearance from One Direction.