The 43-year-old singer said it would be "nice" to celebrate "in some way," reported Daily Mirror.
"I think it's really flattering that people are so supportive of the Spice Girls individually and collectively. It's one of those things that have been discussed.
"I think it's nice to celebrate it in some way. I can say that there's been talks. That's fair and honest," she said.
The group consisted of Melanie Brown, Melanie Chisholm, Emma Bunton, Geri Halliwell, and Victoria Beckham.