Britney Spears turned 30 years old today – but she has so many hits that it seems as if she's been around a lot longer. With that in mind, our question for you this week is: What is the best Britney Spears song of all time?

You can vote here in the comments, on facebook.com/rollingstone or on Twitter with the #weekendrock hashtag.

Last week we asked you to name your favorite Christmas songs, and we compiled the results in this top 10 list.

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