Melanie Chishlom plans to spill Spice Girls secrets!

Los Angeles: Singer Melanie Chisholm, popular as Mel C, has already planned that when she turns 80, she will pen an autobiography about her life as a part of popular band Spice Girls.

The former Spice Girls member 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 that she doesn't get into trouble with her former bandmates - Geri Halliwell, Emma Bunton, Mel B and Victoria Beckham.

"Of course shenanigans did go on (in the 1990s) but I'm not going to share them,"contactmusic.com quoted the 40-year-old as saying.

"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," she added.