05/22/2013 09:04 am ET

Spice Girls' 'Strong Enough' Song Emerges As Unheard Demo From Girl Group

An unheard track which is reportedly a demo from the early days of the Spice Girls' career has made its way online.

Called "Strong Enough," the video was posted to YouTube on Tuesday, with the accompanying description reading "Demo taken from a cassette that Melanie B sold at auction. Leaked in 2013."

The mid-tempo song has the girls harmonizing, "I am strong enough, strong enough, strong enough / I am strong enough, strong enough, strong enough" -- take a listen above.

While there has been no official word from the girl group on the track, Melanie Brown does have a habit of participating in charity auctions, often selling memorabilia from her Spice Girls days.

Made up of Victoria Beckham, Melanie Brown, Emma Bunton, Melanie Chisholm, and Geri Halliwell, Spice Girls last released an album of new material in 2000, when "Forever" hit stores. The UK group reunited in 2007 for the release of a compilation album, "Greatest Hits," which sent the girls on a world tour.

The Spice Girls reunited again in 2012, when they performed at the London Olympics.

Spice Girls Perform At The Olympic Closing Ceremonies