Credit: sotkam/Youtube

During her Rebel Heart tour stop at the O2 Arena in Prague on Saturday, Madonna welcomed Jessica Chastain on stage for a performance of “Unapologetic Bitch.” It wasn’t anything like when the “Material Girl” kissed Britney Spears during the VMAs, but she did drop down on all fours for a spanking.

“I gave Madonna a spanking [and I’ve got] a video to prove it,” Chastain wrote on Facebook alongside a video shot by a concertgoer.

The actress, whom the singer called the night’s “Sexy and Beautiful Unapologetic Bitch” on Instagram, posted another photo from the performance. “The moment right before [Madonna] handed me a banana,” Chastain wrote.

Watch the moment below.

The Crimson Peak star follows in the footsteps of Katy Perry, Amy Schumer, Anderson Cooper, and Diplo, who have all guested on stage during the Rebel Heart tour.