However, no concertgoer in the crowd of the superstar's Las Vegas Enigma show could predict the treat she had in store for them on Saturday, January 26.
During the concert, the pop star was joined on stage by A Star Is Born director and costar Bradley Cooper for a haunting rendition of the film's Oscar-nominated song "Shallow." After Cooper joined her on stage he joked that he couldn't "hear anything" and has "never used" in-ears before.
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A Star Is Born tells the tragic love story of ME, played by Cooper, who helps Gaga's struggling artist Ally. He looked into Gaga's eyes as he sang the lyrics that she wrote for the film. Bradley and Gaga pointed at each other, indicating their appreciation for one another's talent.
Lady Gaga fans loved the live performance of "Shallow". The song is also set to be performed at the Academy Awards at the end of February.
Things escalated to an even more magical level when Lady Gaga took the helm and sang her part. Much to the crowd's delight, Bradley threw in a little air guitar as his co-star finished up the song with its famous dramatic ending.