She told the Daily Star Sunday newspaper, “There is going to be an announcement very, very soon. Sooner than you actually all know.”
But she admitted the trio, who are making anniversary plans without Mel C and Victoria Beckham, have yet to decide on what the first single they release will be.
Meanwhile, Mel C recently admitted she felt the quintet’s appearance at the 2012 Olympics closing ceremony should have been their final one.
In an essay for LOVE magazine, she wrote: “Truth be told, earlier this year after several face-to-face meetings with the girls I made the difficult decision not to be part of a proposed reunion with Emma, Geri and Melanie. Victoria had already bowed out understandably with the demands of her fashion label and her rather large family.”
“The hardest part for me was letting people down, the girls, the fans, civilisation?! Unfortunately something didn’t feel quite right and I had to follow my gut.”
“I’d love to play huge arenas across the World, sing our brilliantly bonkers pop songs and relive our former glory. It is of course a very lucrative opportunity too. But we were a five-piece band. Didn’t we reach a peak with the Olympics? There’s a lot to be said for bowing out on a high note.”
“For me the absolute pinnacle of my Spice existence was being watched by a billion people around the globe belting out Spice up Your Life on top of a black cab at the 2012 London Olympics. Anything less than the full line-up just didn't feel like we'd be doing justice to the band or the fans.”
And Mel wishes the Spice Girls could simply be remembered for what they have achieved, rather than people wishing for them to reunite.
