The Big Reunion 2014 features exclusive and explosive accounts from former pop heroes, with revelations about drugs, fisticuffs, rows, eating disorders, shattered dreams and how the music industry can leave even apparently successful stars penniless.
Each band has just two weeks of intense rehearsals before they step back onto the stage to perform once again in front of thousands of fans.
This week, all five members of Damage come face to face to confront each other about their past - and all the bands meet each other for the first time at rehearsals.
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3T (Taj Jackson, Taryll Jackson, TJ Jackson)
5th Story (Adam Rickitt, Dane Bowers, Gareth Gates, Kavana, Kenzie)
A1 (Ben Adams, Christian Ingebrigtsen, Mark Read)
Damage (Jade Jones, Andrez Harriott, Rahsaan J Bromfield, Noel Simpson)
Eternal (Easther Bennett, Vernie Bennett, Kelle Bryan)
Girl Thing (Jodi Albert, Anika Bostelaar, Michelle Barber, Linzi Nartin, Nikki Harring