Adele has agreed to perform on the X Factor final next month, sources have claimed. The 'Set Fire To The Rain singer is tipped to give her first performance since undergoing vocal chord microsurgery at the ITV contests December 11 conclusion. Adele is believed to have agreed to the slot earlier in the year after being approached by X Factor boss Simon Cowell. Her management said this week she is still planning to make it, an insider told The Sun. Its amazing news for fans and viewers. Adele had apparently been secured to assist Louis Walsh at Judges Houses, but was bumped for X Factor regular Sinitta at Cowells behest. Adele announced in October that she had to cancel all of her remaining 2011 concerts in order to undergo surgery. DS