Lady Gaga's Vegas Show, Bradley Cooper make surprise appearance to sing 'Shallow'
The star, who received an Oscar nomination for her role in the film directed by Cooper, has performed the film's title song as the closing number of her Enigma show, the residency that kicked off late December, reported The Hollywood Reporter.
After Cooper joined Gaga onstage, the singer was heard saying, "I even got you in-ears!" Cooper also joked that he couldn’t “hear anything" and has "never used" in-ears before.
"Hello Vegas," Cooper announced before he started singing. Throughout the performance, Gaga played the piano while Cooper sat alongside her.