Much like Taylor Swift's endless parade of superstar cameos on The 1989 World Tour (PLEASE welcome to the stage...!), Madonna has turned the "Unapologetic Bitch" section of her Rebel Heart Tour into a veritable Who's Who of Hollywood.

She's already delivered spankings to Anderson Cooper, gotten sassy with Jessica Chastain in Prague and twerked with Katy Perry, so it's of no real surprise to hear that she went after the Princess of Ponytails, Ariana Grande, during last night's show (January 24) in Miami.

The "Focus" singer, who is currently busy tying up the last remaining strings of her upcoming LP (which may or may not be called Moonlight), was invited on stage by the Queen of Pop for a rousing rendition of Madonna's defiant Rebel Heart anthem.

As a hardcore M fan, Ari looked positively starstruck alongside Her Madgesty, covering her mouth in disbelief the whole time while giddily playing along.

"Kewtest Unapologetic Bitch EVER!! Thanks Ariana!!! Tonight was so much FUN! Miami show #2❌⭕️! ❤️#rebelheartour. Last and sweetest U.B. Of the US leg of the tour. 💘💘🎉🎉💋💋🍌🍌 thanks Ariana ❤️#rebelheartour," Madge gushed on her Instagram later that night.

And Ariana? It's safe to say she was equally thankful.

"I am dead. @madonna thank you for the spanking & the banana. #rebelheart #forever #unapologeticbitches 💜," she wrote.

Watch an utterly overwhelmed Ari below.

And while they don't WANT DJ Khaled to be winning on stage with Madge, the #AnotherOne Snapchat hero also made a cameo during the show the night before (January 23) to present the Queen with some diamonds. Bless up!

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