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Jessie J at the Brit Awards

At Jesse J's concert in San Jose, California, a surprise guest in the form of Demi Lovato joined her on stage, and they sang 'Bang Bang' together.

And people really, really liked it.

They went completely nuts.

And Jesse J was in complete agreement,  she later tweeted she had wanted to sing with Demi "forever".


A photo posted by Jessie J (@isthatjessiej) onDec 12, 2014 at 9:41pm PST


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