Performing at Barclay's Center in Brooklyn, New York, Perry helped a fan named Katie facilitate a surprise proposal between her girlfriend Becky. And on National Coming Out Day, too!
Bringing the women up on stage, Perry - who was dressed in a sequin silver bodysuit with oversize sleeves, a half skirt and a beaded Cher-like headdress - pointed out that she had a shooting star and asked each what they would wish for. "And she's ideal every time I look at her".
"Becky, will you marry me?" she said. Meanwhile, Perry could hardly contain herself, dropping down to the stage floor in pure excitement and joy.
While Becky laughed and put her hands up to her mouth in shock, Katy jumped up and squealed: "Say yes, Becky, if you want to get married!"
Katie and Becky will have these memories forever!
"My wish came true", Katie said as Perry hugged the two and posed with them together for a selfie.
Luckily for Becky and Katie, a fellow fan filmed the magical proposal and has since shared with on Twitter.
Fans in the crowd recorded the moment, and Perry posted bits of it to her Instagram story.