Controversial X Factor finalist Christopher Maloney, from Liverpool, will appear in the live tour despite reports that he'd fallen out with show bosses.
The singer, who split public opinion, will join other acts including fellow finalists Jahmene Douglas and James Arthur.
Maloney, who came third in this year's series, took to Twitter to ask people to stop what he described as "online abuse".
He said: "all I done was follow my dream, coming 3rd was an achievement. feel gutted I didn't win an im unwell right now, plz xx."
His future on the tour was put in doubt after reports of rows behind the scenes at the X Factor final in Manchester.
Arthur, this year's winner, is set to top the singles chart this weekend after shifting more than 255,000 copies of his song, Impossible.