Girl Thing, Damage, Eternal, A1, and 3T are all getting back together to reminisce on the time they spent as pop stars - and air any grievances they had with each other - before getting back on the road for a tour.
To make up the sixth act, ex-solo stars Kenzie, Adam Rickitt, Dane Bowers, Gareth Gates and Kavana are forming a brand new band 5th Story.
We'll have to wait to hear how that all came about because first up it's Damage (minus one of their members, Coreé) and Girl Thing.
They'll be telling all about the highs and lows of their careers – and it's very revealing…
The Big Reunion, ITV2, 9pm