Mel C wants to write an autobiography when she's 80.
The former Spice Girl plans to reveal the band's secrets in a tell-all book, but says she wants to wait until she's an "old woman" so she doesn't get into trouble with her former band mates - Geri Halliwell, Emma Bunton, Mel B and Victoria Beckham.
She told reporters: "Of course shenanigans did go on [in the 1990s] but I'm not going to share them.
"I'm going to save them for my book when I'm 80. It's not something that I'm inspired to do at the moment. But when I'm an old lady and I don't mind who I upset, I might dish all the dirt then, I think we've all got dirt."
The 40-year-old singer, who last performed with the Spice Girls at the 2012 Olympic Games, says her and the other members understand Victoria, 39, doesn't enjoy performing any more and is focused on her fashion career.
Mel C said: "I don't think we'll ever do anything which was as exciting or fantastic as the Olympics.
"Of course, us girls are very aware that Victoria doesn't enjoy performing any more and that's not her passion now, we completely understand that."
The singer is "proud" of everything Victoria has achieved, after taking the industry by storm, and thinks her success is "remarkable" coming from a pop group.
She said: "It's unprecedented. You would never imagine a girl from a band in the UK would absolutely reign in the world of fashion. I always feel proud on the red carpet saying, 'I'm wearing Victoria Beckham'."