Jen is quitting.

Jennifer Aniston is trying to kick a very dirty habit. She is giving up smoking and caffeine. She was on the set of Courtney Cox's new show "Dirt" which Aniston will be appearing in. The much anticipated episode features Jen and Courtney in a lip lock. While on the set Jennifer was complaining how hard it is to quit smoking and caffeine at the same time. She has been going to yoga to help her but all she wants is a diet coke!