Onset for her second day of filming, Jessie couldn't help but smile from ear-to-ear as she posed alongside Ariana and Nicki for a 'Bang Bang' selfie.
And it seems the 'Do It Like A Dude' singer had every reason to be flashing her gnashers after her new track has headed straight to the number one spot on the US iTunes chart!
Power trio, Jessie, Ariana and Nicki premiered their new single 'Bang Bang' earlier this week and promising big things it seems their track has already been a huge success.
Taking to the camera, Jessie posted a snap of herself, Ariana and Nicki as they were busy filming their new tune's music video.
As the US music stars posed up a storm with their perfected pouts, an excited Jessie can be seen grinning proudly as she sported bold red lips.
Captioning her photo, Jessie wrote: ""BANG BANG INTO THE ROOM" #onset #bangbang #videoselfie AGHHHHHH! I can't wait for you all to see it! Is this life? Am I dreaming? @nickiminaj @arianagrande."
But it wasn't only Jessie who was full of admiration for her fellow vocal powerhouses. Reposting Jessie's snap, both Nicki and Ariana had lots to say about their new music pals.
Nicki wrote: "Jessie J is a stunning class act. And Ariana is a cute liddle lady bug. #BangBangOniTunes BANG BANG."
While Ariana insisted she was having "the time of her life", she said: "these divas - love them more than words. both so down to earth and fierce. living for u @nickiminaj @isthatjessiej."
With their summer track already a certified winner, we can't wait to see what these fierce females have in store for the video.
Reveal is now on Google Plus! Join us here for the latest pictures, fashion and celebrity news!
Listen to Jessie, Ariana and Nicki's new single 'Bang Bang' in full here: