How behaviour impacts celebrities endorsements

Please narrow the topic further with specific examples. Part of the assignment is to take a broad topic and narrow it so the research is more manageable. The broad topic was Celebrities in the media, so I am trying to narrow it into how bad behaviour effects endorsements, and who it impacts.

Please follow the directions below

Effective introduction with a specific Thesis statement
Use transitional devices to achieve coherence
develop examples and information to support thesis
create effective conclusion
use variety and emphasis in sentence creation
Include a title, in text citation, and a complete bibliography
I AM A CANADIAN STUDENT SO THE PAPER SHOULD HAVE SOME CANADIAN CONTENT
Please use a minimum of THREE different sources, not from the same media.
Thanks,
Suzanne