Atomic Kitten, Liberty X, 911 and Honeyz will also play the new dates in December as part of the 'Big Reunion Christmas Party' tour.
The pop acts will play Birmingham's LG Arena on December 12, before moving on to Sheffield's Motorpoint Arena on December 13.
They will then move on to London's O2 Arena on December 14, before concluding the run at Manchester Arena on December 15.
Tickets for the Christmas shows go on sale from 12pm on March 28.
The new dates follow the Big Reunion arena tour in May, which starts in Sheffield on May 3 and finishes at Belfast's Odyssey Arena on May 17.
The Big Reunion concludes its run on ITV2 this Thursday (March 28) at 9pm.
Watch the music video for 5ive's 'If Ya Gettin' Down' below: