The 20-year-old fell sick after eating a tuna sub sandwich last night (October 31) and is now an IV drip at an LA hospital, according to TMZ.
© Fox / Ray Mickshaw
Emblem3's Wesley and Keaton Stromberg are said to be rehearsing without Chadwick, and will perform as a duo on tonight's show if necessary.
1432 singer Camila Cabello is also said to be feeling the effects of the tuna sandwiches, which were ordered as a takeaway by a number of contestants and crew members - six of whom are now believed to be out sick.
The X Factor USA's live shows got under way last night, a day earlier than originally scheduled.
The talent show continues tonight on Fox, with four acts due to be eliminated.
Photo gallery - The X Factor USA 2012's opening live show:
Copyright: Fox Brian Dowling
