The pop star's Sweetener World Tour began in Albany, New York, featuring music from her fourth album, "Sweetener", and her fifth, "thank u, next". Us reports that Miller's 2016 single "Dang!" was the final song to play before Grande started her performance.
"They're playing Mac while we wait for Ariana", another fan tweeted.
Ariana Grande kicked off her mammoth Sweetener World Tour last night in NY, and fans were eager to get their hands on some brand new merch to mark the occasion.
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Miller's songs soon stopped playing and Ariana Grande took the stage with fans going insane in the audience. She also pointed out that one of the leaves wraps around her "always" tattoo, which was created in Davidson's handwriting.
Fans who attended the concert shared that Miller's music was playing at the venue ahead of the show, with several people using Twitter to express their feelings over the touching choice.
Her post features a whiteboard reading "you like my rights? gee thanks, just voted", a play on Grande's recent hit song, 7 Rings.
Even though Grande revealed that she would not be performing the song "ghostin", which is about Mac Miller, on stage, many can guess that this will not the be last time Ariana Grande honors her ex-boyfriend on tour.