If you dreamed a dead celebrity talked to you, it can mean
- You are an ardent fan of that celebrity.
- You have been watching too much of that celebrity. If that person was related to music, then you may have been listening a lot of their music.
- You have something to say to that celebrity and you desire to communicate your message so much that you dream about them talking to you.
- If you had actually met that celebrity, then the dream might be a replay or mesh up of old memories.
- You may have seen, heard or had something that reminded you of that celebrity. This trigger can activated the invention of a dream.
This is my experience on what it means when you dream of dead people talking to you.
Interpreting Dreams on Dead People book link.