Identify this movie where man dies but his ghost lingers

Question

I am trying to identify this movie, here is what I remember of it;

• It is an old movie, probably 90's
• A man (yellow hair I guess) dies, but his ghost lingers
• Ghost watches his wife and best friend (but he was actually bad)
• Ghost discovers his death was some kind of complo.
• Encounter a african-american woman who can hear him, but cannot see
• Haunts her (by singing a song about henry) until she agrees to go to talk to man's wife about the man's death
• Wife doesn't believe her first, but she convince her by saying things only wife and the man could have possibly know.

Answer 1

The movie you are looking for is Ghost with Patrick Swayze in the title role and Whoopi Goldberg as the medium who speaks to him. I cannot do much else to proove my claim than refer you to Wikipedia to convince yourself that its plot matches your explanations pretty closely.