Conversation so far:
What is the slogan Girl Power?
Girl power is a slogan that encourages and celebrates women's empowerment, independence, confidence and strength
What does the slogan Girl Power represent in regards to the Spice Girls?
The phrase was a label for post classical neo-feminist empowerment embraced by the band: that a sensual, feminine appearance and equality between the sexes need not be mutually exclusive.

Question: Did Spice Girls come up with Girl Power?
Self-contained rewrite: Did the Spice Girls come up with the slogan Girl Power?