Conversation so far:
When did Whitney die?
on February 11.
How did she die?
reported that Houston's death was caused by drowning and the "effects of atherosclerotic heart disease and cocaine use.
What else was discovered about her death?
Toxicology results revealed additional drugs in her system: diphenhydramine (Benadryl), alprazolam (Xanax), cannabis and cyclobenzaprine (Flexeril).
Were there any other details found about her passing?
The manner of death was listed as an "accident".
How was her death viewed by others?
CANNOTANSWER.
When was her funeral?
An invitation-only memorial service was held for Houston on Saturday, February 18, 2012.
How many people were there?
CANNOTANSWER.
What happened at the funeral?
Among those who performed at the funeral were Stevie Wonder (rewritten version of "Ribbon in the Sky", and "Love's in Need of Love Today").

Question: Did anyone else perform?
Self-contained rewrite: Did anyone else perform in addition to Stevie Wonder?