All Saints are reforming in 2014.
The 'Never Ever' hitmakers - who first parted ways 12 years ago - have announced they will be supporting the Backstreet Boys on tour during their five UK dates next Spring.
The British girl band said in a statement: ''We are really looking forward to performing together as guests of the Backstreet Boys on their tour. We can't wait.
''We're singing a lot of big songs like 'Never Ever' and 'Pure Shores' which will be amazing.''
All Saints were one of the most popular pop groups of the 90s, scoring a string of top ten hits after rising to fame in 1997.
The news comes as a surprise since Melanie had insisted back in August 2009: ''All Saints are never getting back together again. I never want to sing again. I recently did the Brits with Nic and we just went round chatting to people and then got drunk. That's my goal - to get paid for chatting to people and getting drunk!''
The tour, which kicks off in the UK in Birmingham on March 6, 2014, also marks a comeback for the girls' 90s pop rivals the Backstreet Boys, who will be performing together as the original line-up for the first time in 10 years thanks to the return of Kevin Richardson.
All Saints will be supporting the Backstreet Boys on the following dates:
March 6 - Birmingham, LG Arena
April 1 - Dublin, The O2
April 3 - Glasgow, Hydro
April 4 - London, The O2
April 5 - Manchester, Phones 4u Arena
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