All five members of the iconic pop group - completed by Mel B, Victoria Beckham and Geri Halliwell - locked lips during their time together, and the former Sporty Spice has admitted her blonde band mate was her favourite.
Speaking to the Daily Mirror newspaper, she said: ''I've always been so drunk every time, it's hard to remember... But I would have to say Emma!''
However, Mel C explained she has only even kissed girls to be ''silly'' rather than because of any ''sexual'' feelings.
She added: ''I've never dated a girl but there's often been speculation, which I find quite funny. I've kissed girls but it's more being silly than anything sexual.
''There are so many hot girls out there but, actually, boy-wise, that question stumps me.
''I am so unimpressed. It would be quite nice to have someone to lust over but I really couldn't say anyone.''
She also explained the status of her love life, insisting she is ''completely single''.
She said: ''Setting the record straight, I am completely single. I've been having loads of fun, have met loads of new friends, my social circle has massively widened and if a chap wants to take me out for dinner...''
'Smalls Change (Meditations Upon Ageing)' arrives in April.
The two awards have made for a great 72nd birthday present for the country music icon.