The 43-year-old will perform her latest track 'Live It Up' on the semi-final episode of the show on May 27, reported Sun Online.
Pop star Demi Lovato will also perform her new single 'Heart Attack'. Singer-songwriter Ellie Goulding and Olly Murs will also stage their numbers, together with last year's winners Ashleigh and Pudsey.
The high profile performances will take place before the results are announced. The semi-finals will see nine of the final 45 acts perform live.