London, UK - We have been changed for good after Ariana Grande and Cynthia Erivo's on-stage reunion at Ari's Eternal Sunshine London stop!

During the Petal singer's second show at the O2 Arena on Sunday, she surprised fans by bringing out her Wicked co-star for a duet, per viral clips from the concert.

Ariana and Cynthia first performed For Good, with the former sporting an off-white Givenchy organza dress with puffy sleeves and her signature ponytail.

Cynthia, meanwhile, stunned in an oversized white coat and matching shirt tucked under a pink embellished bralet and hot pink pants, plus black Christian Louboutin boots.

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The co-stars then sat and sang a medley of Get Happy/Happy Days Are Here Again, which was exclusively performed at their 2025 television special Wicked: One Wonderful Night, before embracing as the British artist left the stage.

The One Last Time singer is in the final stretch of her Eternal Sunshine run, with her 10-show residency in the UK set to run until September 1.

Ariana – who's reportedly back together with her ex, Ricky Alvarez – has announced that she will be stepping back from the public spotlight after the conclusion of her tour.