"I have always loved the Smurfs as a kid and now my boys are the biggest Smurfs fans ever," the pop star said in a statement. "I wanted to surprise them with a song in the movie." Half live-action, half animated, The Smurfs 2 will be open in theaters on July 31st.
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This article originally appeared on Rolling Stone: Britney Spears Records 'Oh La La' for Smurfs Movie