Conversation so far:
Was Anna Nicole Smith a spokeswoman?
In October 2003, Anna Nicole Smith became a spokeswoman for TrimSpa.
How long was Anna Nicole Smith a spokeswoman for TrimSpa?
Anna Nicole Smith was a spokeswoman for TrimSpa until her death in 2007.

Question: Was her career as a Spokeswoman successful?
Self-contained rewrite: Was Anna Nicole Smith career as a Spokeswoman successful?