Gaga and Cooper are currently preparing to perform the song at Sunday’s Oscars together. Cooper already performed the tune with Gaga during her Las Vegas show, Enigma, and he opened up about the performance during a recent appearance on The Late Show With Stephen Colbert.
“I watched the video back… and I just sort of look like this idiot from Philadelphia singing with Lady Gaga… but I was like, ‘Oh, Jackson’s gone,’” he said, referencing his character. “He’s gone. I’m not gonna try to get him back. But it will be me singing [at the Oscars].”
For more from Cooper on the Oscars, watch ET’s exclusive interview with the director and actor below: