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A demo of Britney Spears' new song "Ooh La La" from the upcoming Smurfs 2 soundtrack made its way onto the internet this week. After the demo leaked online, Britney tweeted:

And Brit's not the only pop star connected to the film - Katy Perry is slated to return for the sequel as the voice of Smurfette.

UPDATE: The song was pulled down from YouTube shortly after the leak, but Rolling Stone has it up HERE.

Did you get to hear the demo? What do you think!? Comment with your thoughts below!