So this is a spoiler but in the story of a star is born Jack ends up dying in a car crash. I have a feeling that scene is what this still is from. Notice how Ally is glammed up compared to her looks in earlier scenes. This would be towards the end of the film when her career is really blowing up. I have a feeling this will be the scene when Ally finds out Jack has either been hurt or died.   EDIT: Also I think this may have been the scene they shot the day Gaga found out Sonya died.