...or DOES she?
Spears was a Pepsi spokes-person for quite a while. Even if you don't remember her commercials you can read the lyrics to her smash hit "Joy of Cola" here.
Earlier this year, a blog reported that Spears gave up Pepsi in order to "Drink 24 cans of Coke a day". I'm not sure that's the 'Coke' we're talking about. Despite debatable authenticity, the blog post can be seen here.
But let's face it, whether you think Brittany is a 'viable celebrity' or a Coke Addicted Train wreck, the bottom line is that some celebrities drink Coke and others drink Pepsi. You can see a list of which celebs drink which sodas here. The celeb list can also be seen on the Coke vs. Pepsi Squidoo lens.