Watch: Lady Gaga brings out Bradley Cooper for surprise 'Shallow' duet in Las Vegas
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Lady Gaga gave her Las Vegas residency fans a huge surprise on Saturday (Jan. 26). She brought her “A Star Is Born” director and leading man Bradley Cooper onstage to perform “Shallow.”

In a fan-captured video of the performance, the crowd screams as Gaga hugs Cooper before they head over to the piano. The “Million Reasons” songstress helps Cooper insert in-ear monitors and gives him a quick peck on the cheek before he sits on a stool in front of the mic. He smiles at the audience and says “Hello Vegas,” to more resounding screams.

Related — Watch: Lady Gaga delivers emotional NBR Best Actress Acceptance Speech for ‘A Star Is Born’

Gaga kneels in front of Cooper, looking up at him as he sings the first verse. Everyone screams at his pause and Gaga appears to wipe away a tear before she takes her turn at the piano. The pair are incredibly cute as Cooper points at Gaga, signaling the audience to give it up for her.

It’s ironically a sort of life-imitating-art moment, as Gaga allows Cooper to sing in front of a live audience the way that his character, Jackson Maine, gave aspiring songwriter Ally a chance to sing at his concert in “A Star Is Born.”

The A-list actor-writer-director struts around the stage a little, playing air guitar as Gaga sings the sweeping, infectious chorus. They come together for the chorus twice, with Cooper sitting next to Gaga at the piano with his arm wrapped around her waist at the end.

Lady Gaga, Bradley Cooper, “Shallow,” and “A Star Is Born” have done well throughout the 2019 award season. Gaga won Best Actress and Best Original Song (“Shallow”) Golden Globe Awards. She tied Glenn Close for a Critics’ Choice Award, and she and Cooper won Best Actress and Best Director National Board of Review Awards, respectively.

“A Star Is Born” is up for seven BAFTA Awards and also snagged seven Oscar nominations, including Best Picture, Best Actress for Gaga, Best Actor and Best Adapted Screenplay for Cooper, along with Best Original Song for “Shallow.”

Gaga and Cooper’s 2018 “A Star Is Born” remake features multiple original songs. The film follows the 1976 version of the rock-focused drama, which previously starred Barbra Streisand and Kris Kristofferson. The 1976 film won a Best Original song Oscar for “Evergreen” and won five Golden Globe Awards, including Best Original Song (“Evergreen”), Best Motion Picture Musical or Comedy and Best Actress and Best Actor awards for Streisand and Kristofferson.

Watch Lady Gaga and Bradley Cooper’s entire “Shallow” Las Vegas duet above and stay tuned to AXS for more on Lady Gaga and “A Star Is Born.”