Yep. When people see the celebs that they love smoking, they start thinking smoking is a normal, aspirational thing. Says who? Says science. Lots and lots of science.
"The Role of the Media in Promoting and Reducing Tobacco Use. Tobacco Control Monograph No. 19." U.S. Department of Health and Human Services, National Institutes of Health, National Cancer Institute. Bethesda, MD. June 2008.http://cancercontrol.cancer.gov/brp/tcrb/monographs/19/m19_complete.pdf