Speaking to ITV1's This Morning, Nicola Roberts hinted that they would mark their birthday in November, but refused to give more details of their plans.
"I wanna tell you everything but I really can't!" she said. "It's our tenth birthday in November so we will definitely celebrating."
Asked if they planned to mark the occasion, Roberts replied: "Definitely."
Girls Aloud have been tipped to play the Royal Variety Performance in November as part of their anniversary celebrations.
Quizzed on watching the Spice Girls' comeback at yesterday's Olympics Closing Ceremony show (August 12), Roberts said: "It was amazing. I was a super Spice Girls fan when I was little so I was relishing in the nostalgia."
Asked about Girls Aloud's style, she said: "We were always really individual anyway... but I think now we are all so much more different and individual.
"I'm quite experimental with fashion and I don't really care that much to be honest... fashion is an expression - it's whatever you feel on that day."
Watch Digital Spy's recent interview with Nicola Roberts below: