Britney Spears has confirmed June 16 as the release for her new song 'Ooh La La'.

The superstar posted: "I heard an early demo of #OohLaLa smurfed its way onto the internet today :( The real version will be at radio and iTunes June 16th :)"

"I have always loved the Smurfs as a kid and now my boys are the biggest Smurfs fans ever." 

"I wanted to surprise them with a song in the movie. I know they'll think it's Smurftastic!"

'The Smurfs 2', which is released in the US and the UK on July 31, will follow the Smurfs on a mission with the help of their human friends to find Smurfette, after she is taken by their archrival Gargamel. 

The track is taken from the upcoming 'Smurfs 2' movie, and was leaked in full on May 17. However, Spears has admitted that the leaked version is simply an "early demo".

Listen to Britney Spears' new track 'Ooh La La Smurf 2 (New Song 2013)) Official', below: