Victoria Beckham may be on tour with the Spice Girls, but she's dishing all about personal time with soccer stud hubby David.

"We spend a lot of time socializing at home so we don't get photographed," Posh told "Extra." "I couldn't live a life where I was under the spotlight everyday."

She added, "If you look at someone like Britney Spears, I couldn't do that. I've got to have my privacy at home with my husband and my children. Otherwise, I'd end up going loopy."

But this private gal and mom of three is a powerhouse businesswoman, working seven days a week on her DVB fashion line.

"That brand for me is like my fourth child and I've very passionate about what I do," she said. "I'm not just a celebrity who puts my name on things. That doesn't interest me."

Posh is putting her name now on a best-selling style guide, "That Extra Inch: Hair, Heels and Everything In Between."

"This book is about not having to spend a lot of money. It's not about what you spend to look good. It's just about being realistic," she explained.

As for her tour with the Spice Girls, it's "the icing on the cake," she said. "It's just so much fun. I do my fashion during the day and then I meet up with the girls and the kids and David and we do shows in the evening. So it's really getting the best of everything at the moment."