The 'Bang Bang' singer joined Madonna on stage Sunday during her Miami performance, which marked the last of her US shows on her world tour.
Madonna took to Instagram to gush over the star, calling her the 'Kewtest Unapologetic Bitch EVER!!'
Ariana naturally was just as excited.
'I am dead. @madonna thank you for the spanking & the banana,' she captioned a video featuring her dancing on stage with the Material Girl.
From ET Via Yahoo! News
Madonna was also joined on-stage that night by DJ Khaled who bought her some diamonds!