YouTubers Max and Harvey have got big dreams as they kick-off their X Factor: Celebrity journey…can it lead to a collab with megastar Marshmello? Visit the official site: http://itv.com/xfactor SUBSCRIBE: http://bit.ly/TXFSub Facebook: http://bit.ly/TXFFB Twitter: http://bit.ly/TXFTwi Download The X Factor mobile app: http://bit.ly/TXFapp Watch full episodes on ITV Hub (UK ONLY): http://www.itv.com/hub/the-x-factor