The 35-year-old said she wants to reform the '90s girl group, but admitted that she hasn't yet discussed the idea with her former bandmates Victoria Beckham, Emma Bunton, Geri Halliwell and Melanie Chisholm.
Speaking to Contactmusic, she said: "I'd love to get back with the Spice Girls. I've always championed more Spice Girls concerts, DVDs and music.
"But we haven't had that conversation as a group yet and I can't speak on everyone's behalf."
Tthe Leeds-born singer added: "Right now, we're all talking about the musical Viva Forever, which is coming out next year.
"I'm not allowed to say anything about it yet though."
The Spice Girls continued as a four-piece in 1998 after Halliwell's departure and eventually split in 2001. They reunited for a 2007 world tour, which came to a premature end in 2009.
They have also been tipped to perform at the opening ceremony of the 2012 Olympic Games in London, but both Beckham and Chisholm have both shown reluctance to reform.
