The X Factor: Little Mix have one more song to sing ... the song that could be their SINGLE! Tulisa's lil'muffins take to the stage for their rendition of Cannonball -- will it catapult them to success? See more at http://itv.com/xfactor Buy Little Mix's performances from iTunes: http://bit.ly/ujkLjo. Download the winner's single from iTunes: http://bit.ly/ujkLjo. Buy tickets to see Little Mix at The X Factor Live Tour 2012: http://bit.ly/olRxet