Chisholm admitted the band nearly split up several times before Geri Halliwell famously walked out on the girl group in 1998.
In a documentary reflecting on their time together, Sporty Spice admitted that even she was once nearly thrown out of the group after a particularly stormy row, reported Daily Mail.
"She'd (Geri) left before but not publicly. I mean, I think a few of them had left, well, Melanie and Geri left a few times. I nearly got kicked out once as well, but that's another story.
"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," said Chisholm.
"They, they are the closest of all of the band. You know, they're absolutely in each other's pockets or they can fight like cat and dog," she added.