The star, formerly known as Sporty Spice, has opened up about the fivesome's tumultuous relationships during their 1990s heyday.
In new tell-all Tv show, Spice Girls' Story: Viva Forever, Chisholm admits she was almost booted out of the band following a row and reveals that Geri Halliwell temporarily walked away from the group before she officially quit in 1998.
She says, "She'd (Geri) left before but not publicly. I mean, I think a few of them had left, well, Melanie (Brown) and Geri left a few times.
"So yeah, I mean, it was difficult and you know, I think Geri would say these things herself. But you know she was having some personal issues and it's no secret that her and Melanie had a very fiery relationship in the past.
"I nearly got kicked out once as well, but that's another story."
The show, which is to help promote the band's West End musical Viva Forever!, will air in the U.K. on Christmas Eve (24Dec12).