The Viva Forever singers hit headlines earlier this year (Aug15) when a report suggested Mel C would be reuniting with Geri Halliwell, Melanie Brown and Emma Bunton to tour in 2016 to mark 20 years since they first stormed the charts with their debut single Wannabe.
It was reported that the pop stars would reform without bandmate Victoria Beckham, who is too busy running her own fashion label, and the reunion could even feature a performance at the BRIT Awards early next year (16).
However, Mel C is adamant there is not enough time to get the band back together for the 2016 awards show.
"There's definitely no chance we'll get our act together by then," she tells Britain's Daily Mirror newspaper, "It's a shame, actually. We need to stop procrastinating and get on with something."
The singer is unsure when any firm plans will be ready to be announced, but she would like the band to play in London's Hyde Park, an outdoor venue which has hosted gigs by stars including Taylor Swift and the Rolling Stones.
"We've talked about it, but we just haven't got our act together," she says. "We're a bit useless. But performing at Hyde Park would be amazing. I went to see Taylor Swift there this year and it was so wonderful. It was a really good, fun gig. I think for the Spice Girls that would be appropriate. It's a bit more friendly."
The Spice Girls enjoyed a triumphant appearance at the BRIT Awards in 1997, winning two prizes and storming the stage with a memorable performance of their hit track Who Do You Think You Are.
They went on to win another BRIT in 2008, as well as two honorary awards in later years.