What’s behind celebrity transformations?

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

(PIX11)-- This week, Justin Bieber made an apology to his fans online and Bruce Jenner is said to be making a docu-series on his "new journey."

Dr. Jeff and Valerie Greenberg discuss the motivation behind celebrities to change for the better--or for worse.