December 02, 2009, (Splash News) – Janet Jackson will perform for the grand final episode of The X-Factor, in which four contestants will fight it out for the crown.

Star judge Simon Cowell originally hoped to have Jackson’s late brother Michael on the show. But the king of pop died before he could fulfill his UK mega-tour.

The X-Factor and its off-stage dramas have been delicious of late, especially those involving Jedward, a twin act that was disqualified, Danyl Johnson, a bisexual contestant with a temper, and Dannii Minogue and her outspoken shtick.

Still in the running are Johnson, Olly Murs, Stacey Solomon and Joe McElderry. All have been allowed to choose their own songs for the final weekend.

Jackson will perform on the Sunday night final and also give her view on the Saturday night performances. An insider said: “The Michael Jackson numbers will be huge crowd pleasers – and each contestant will want to do Janet and the Jackson family proud.”