Fans of Bradley Cooper were left gasping for air as the actor-director made a surprise appearance at Lady Gaga's Enigma show.
Cooper was in the audience for Gaga's show when he appeared on stage to surprise fans with an acoustic performance.
The two then delivered an impromptu act of their Oscar-nominated song "Shallow" from their film "A Star Is Born".
After he joined Gaga onstage, the singer quipped: "I even got you in-ears!"
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