First, both are known for their high-pitched, porcine squeal, their fake nylon-based "hair" glued to their heads, and their cartoonishly pink skin that feels and bounces like genuine AstroTurf. They both got tattoos on their asses shortly after becoming famous.
   Secondly, both Miss Piggy and Baby Spice hang around with supporting casts of bizarre plastic creatures whose limbs are supported and controlled by thin steel rods, including a plush frog whom both have made love to one more than one occasion, usually against the frog's wishes.
   Both tend to gorge themselves on huge amounts of food with alarming frequency. Baby Spice, in a twist we are not fooled by, "accidentally" vomits it all out afterwards.
   When not performing, both enjoy rolling around in their own filth, and both are known for getting scores of young British boys (and Nelson Mandela) extremely horny.
   Both have eight abdominal nipples from which their respective litters must draw nourishment, and both must be drycleaned and re-sewn after long periods of use. Naturally, both become limp and lifeless when Jim Henson's hand is removed from their respective asses.

And remember, they have never been seen together!!