Demi Lovato Sang Ariana Grande's "Bang Bang" Verse With Jessie J, Crowd Collectively Lost Their Sh*t

4 December 2014, 16:51 | Updated: 8 May 2017, 17:09

It might get loud.

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