The Spice Girls "all kissed once in a while".
The quintet - Emma Bunton, Geri Horner, Mel B, Mel C, and Victoria Beckham - were all close friends and occasionally weren't afraid to show their affections for one another.
Quizzed on speculation that Geri and Mel B had an affair, Emma said: "I'm sure we've all kissed once in a while but no, nothing more than that."
Meanwhile, the 'Stop' singer - who has sons Beau, eight, and Tate, four, with fiance Jade Jones - played it coy when asked about rumours she once dated Justin Timberlake.
She laughed: "I'm going to have to say no comment."
All the Spice Girls had a very close bond, which Emma credits for helping her stay grounded throughout their global success.
She said: "I was such a family girl and, being so young, it was quite difficult being away from home so much.
"But I had the girls - they were my rock. It was crazy on the outside but the centre of it was quite calm.
"We looked after each other. We never really let anyone in, we were very solid the five of us.
"Even now Jade, my other half, says, 'When you five are in a room it's like you're being pushed back from the force of it.'
"Because of what we went through together, there's a bond that no one else understands. We might not see each other for months but if I need one of them, they'll be there."
And Emma claims she and her bandmates rarely fought because they didn't have "time".
She told Grazia magazine: "I'm sure we had arguments over clothes we wanted to wear for videos or who was getting their hair done next, but we stuck together.
"We knew we couldn't really have those big arguments. We didn't have time."
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