Little Monsters were treated to a special live performance of the smash hit Shallow, from the Oscar-nominated film A Star is Born, during Lady Gaga’s Las Vegas concert at the weekend.

Gaga surprised and delighted attendees when she invited Bradley Cooper out from side-of -stage (a neat little switcheroo-reflection of their characters’ first performance together in the film), and the pair belted the track live for the first time.

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