Lady Gaga sprung quite the surprise on fans at her latest Las Vegas ‘Enigma’ show last night. For, the supernova invited ‘A Star Is Born’ co-star Bradley Cooper on stage for an impromptu performance of ‘Shallow.’ Their first in a live setting.

Already the recipient of a Golden Globe, the song is in hot contention for an Oscar next month – with the pair likely to take to the stage together to deliver a televised take.

How did they do on their debut outing? Watch below…

Their chemistry was off the Richter.

Vocally, both parties delivered and have us amped for an ever grander rendition at the Oscars.

Your thoughts?