The announcement follows the popularity of ITV2 series The Big Reunion, which has just shown its second episode.
Tickets go on sale this Friday, February 15 at 9am and are priced at £30 and £35/£32.50 for London.
"The Big Reunion follows their every step, as their worlds are turned upside down after years away from the spotlight," promoters Live Nation said of the show.
"For some it's the chance to relive their dream, for others it may open old wounds as they prepare to face demons they thought they had buried forever."
They added: "Each band will have just two weeks of intense rehearsals before they step back onto the stage to perform once again in front of thousands of fans at London's Hammersmith Apollo, tickets for which sold out almost as soon as they went on sale."
The confirmed lineups for each act are as follows:
5IVE (Ritchie Neville, Scott Robinson, Abz Love, Sean Conlon)
Atomic Kitten (Natasha Hamilton, Liz McClarnon, Kerry Katona)
B*Witched (Edele Lynch, Keavy Lynch, Sinead O' Carroll, Lindsay Armaou)
Liberty X (Jessica Taylor, Michelle Heaton, Kevin Simm, Kelli Young, Tony Lundon)
911 (Lee Brennan, Simon 'Spike' Dawbarn, Jimmy Constable)
Honeyz (Celena Cherry, Mariama Goodman, Heavenli Roberts)
The full tour dates are:
- May 3 - Sheffield Arena
- May 4 - Manchester Arena
- May 5 - Newcastle Arena
- May 6 - Aberdeen AECC
- May 7 - Glasgow SECC
- May 8 - LiverpoolArena
- May 9 - Nottingham Arena
- May 10 - Bournemouth BIC
- May 11 - Cardiff Arena
- May 12 - Birmingham LG Arena
- May 13 - Brighton Centre
- May 14 - O2 Arena
Can The Big Reunion bands remember their own lyrics? Find out below: