Conversation so far:
when was Whitney Houston's pre-grammy party?
Whitney Houston's Pre-Grammy party was on February 11, 2012.
what happened at Whitney Houston's pre-grammy party
The Clive Davis pre-Grammy party featured many of the biggest names in music and movies, went on as scheduled – although it was quickly turned into a tribute to Houston.
was Whitney Houston at Whitney Houston's pre-grammy party?
Houston was expected to attend. Davis spoke about Houston's death at the evening's start.

Question: What did they say?
Self-contained rewrite: What did Clive Davis say about Whitney Houston's death at the evenings start of the pre-grammy party?