Demi Lovato Sang Ariana Grande's 'Bang Bang' Verse with Jessie J & Made a Crowd Go Crazy! (Video)
The ladies were both on the lineup at the concert, but Demi surprised the crowd during Jessie‘s set by joining her for “Bang Bang” and singing Ariana Grande‘s verse!
Of course, the crowd went absolutely wild and it’s almost hard to hear her sing in the video captured at the concert.
“😱😱😱… That just happened….. Thank you SO much @JessieJ for having me on stage for Bang Bang… It was an honor!” Demi tweeted.
Demi Lovato Joins Jessie J for “Bang Bang” Live in Concert