The 26-year-old "Twilight" star and the musician were seen together at the concert days after they reunited at the New York Film Festival premiere of the former's new movie, reported Ace Showbiz.
Stewart opted for a casual outfit including a black top, blue pants and a necklace.
She also took a picture backstage with comedian Liza Dye and Vincent, who wore a silver dress.
Stewart has been spotted with Vincent, whose real name is Annie Clark, lately amid speculations that the former had broken up with her former manager Alicia Cargile.
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