This is probably how the kiss happened:

Madonna, an expert at crafting moments like these, was likely the kiss’ architect, and didn’t have to clear it with anyone but herself. Britney on the other hand probably deferred Madonna’s plan to her managers, who then held target-marketing studies, clicked through a series of PowerPoint pie charts in dimly-lit conference rooms, crunched Excel spreadsheet numbers, calibrated their “Britney-Coming-Of-Age” barometer to see if the time was right for such a display (sexy enough to titillate the kids, while toned-down enough to bypass conservative, middle-America parental units), tabulated the results to arrive at “yes,” stuck a wind-up key in Britney’s back, turned it clockwise a few turns, and pushed her out on stage to seal the deal. [via What Do I Know]