Demi Lovato and Jessie J sing Bang Bang together in concert

Jessie J was performed in San Jose, California last night (3), in support of her new studio album "Sweet Talker", released in the US last month.

During the performance of "Bang Bang" in collaboration with Nicki Minaj and Ariana Grande, the British called Demi Lovato to the stage to join the song.

After the performance, the two artists exchanged numerous accolades in their social networks. "WOW!ddlovato Is a dream to share the stage! Thank you, girl! You sang my ass off!" Wrote the voice of "Masterpiece" on her Instagram page.

"This really happened ... VERYJessieJ required for seeing me on stage to sing 'Bang Bang' ... It was an honor!" Replied the American.

Check out the performance below: