The girls are the latest massive stars set to play the Sunday results show when another contestant will be kicked off.

Leona Lewis, Alexandra Burke, judge Cheryl Cole, Whitney Houston and Westlife are among acts already to hit the X stage.

GaGa’s performance is bound to be explosive. At Glastonbury this year she basically set fire to her breasts whilst at the VMAs she pretended to stab herself.

At the American Music Awards this week she played at a piano that was on fire and wore a typically bizarre outfit.

Janet herself is no stranger to controversial performances, having upset America by exposing her boob at the Superbowl in 2004.