Conversation so far:
When did the Spice Girls become popular?
the emergence of the Spice Girls in 1996 with "Wannabe", that the concept of "girl power" exploded onto the common consciousness.
What is girl power?
The phrase was a label for the particular facet of post classical neo-feminist empowerment embraced by the band.

Question: When was Wannabe released?
Self-contained rewrite: When was Wannabe by the Spice Girls released?