Conversation so far:
What is the Hiatus?
In December 2000, the group unofficially announced that they were beginning an indefinite hiatus.
what happened in 1998?
released a new song, "Goodbye", before Christmas in 1998.
The song was seen as a tribute to.

Question: tribute to what?
Self-contained rewrite: What was the Spice Girls song "Goodbye" a tribute to?