Halliwell, 40, along with her bandmates Victoria Beckham, Mel B, Emma Bunton and Mel C, took the world by storm when they burst on the music scene in 1996, reported Showbiz spy.
"The show is about bringing the Spice legacy to a new generation. Spice Girls is about unifying the world - every age, every gender, everyone. It's woman power, it's an essence, a tribe," she said.
Despite falling out in the past, Halliwell says the girls are likes sisters, as they love each other but also argue.
"It's like a family. Families are never perfect, but there's always that foundation of love."
