Fans who attended Lady Gaga's Las Vegas residency "Enigma" this weekend got a real treat!

Lady Gaga started a year-long residency in Las Vegas back in December. Just a month into her "Enigma" residency she is already bringing the heat! Gaga surprised her audience by bringing out her "A Star Is Born" co-star and director Bradley Cooper to join her for the show's finale, which ended up being "Shallow."

"Shallow" is the movie's Oscar-nominated track that Gaga wrote and the two performed in the movie!

Thank you @theacademy ❣️ pic.twitter.com/WK4MtYmsku

— Lady Gaga (@ladygaga) January 23, 2019

This is the first time the duo has performed the song live together, although we are hoping the two will team up for the song at the Oscars. Check out the performance below!