The U2 frontman penned the as-yet-unnamed track for the reunited girl group - Victoria Beckham, Mel B, Emma Bunton, Mel C and Geri Halliwell - who will perform it during their forthcoming world tour.
The group's record label bosses were said to be concerned the group's 'Greatest Hits' album - set to be released next month - would not match the success of their previous LPs and believed Bono's involvement could boost sales.
A source told Britain's Daily Mirror newspaper: "It might seem unusual with the Spice Girls' pop roots and the much rockier work of Bono, but it works.
"There's been a bit of unease as to how the album will perform and if there's still a solid Spice Girls' fan base out there.
"Bono's involvement has lifted the whole camp and he's delighted to have been asked and add his experience."
Bono is not the first star to be asked to collaborate with the girls on their comeback album.
Last month, it was revealed George Michael is writing a Christmas song for the band.
The 'Careless Whisper' singer is confident he can pen a hit for the group to challenge the winner of this year's 'X Factor' - the British TV talent show - for the coveted UK Christmas number one.
The group's high-anticipated world tour starts on December 7 in Los Angeles.
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The Pitt-Jolies have yet to reveal the twins to the world, but they wasted no time in revealing who their godfather will be. Here's a hint... it'll be a "beautiful day" when the twins are christened.
