Madonna Spanks Katy Perry During Her Star-Studded Concert in L.A.

by Jackie Willis 9:50 AM PDT, October 28, 2015
Playing Madonna Spanks Katy Perry During Her Star-Studded Concert in L.A.

Taylor Swift isn't the only one with famous fans.

On Tuesday night, Madonna took over The Forum in Los Angeles, California as part of her Rebel Heart tour, and Ashton Kutcher, Mila Kunis, Queen Latifah, Fergie and Salma Hayek were spotted at the show.

WATCH: Sean Penn's Daughter Dylan Reacts to Dad's Relationship With Madonna

Photo: .

Photo by: Joseph Ferrugio

However, one lucky star was invited up on stage. Swift's frenemy, Katy Perry, was summoned to join Madonna for a toast during the concert. An ET eyewitness saw the pop star seated next to Kunis and Kutcher before she hit the stage, and afterwards spotted her pal, designer Jeremy Scott. 

Photo: Splash News

The 31-year-old pop star grimaced as she sipped out of the 57-year-old singer's banana-shaped flask.

#katyperry #Madonna

A video posted by Tierney (@tiersz) on

"Sharing a Banana with Katy Perry!! Highlight of my show at the Forum!" Madonna Instagrammed to her 4.9 million followers.

The drink appeared to loosen Perry up as she later grinded up on the music icon while on stage. "Best Unapologetic b**ch ever!" Madonna wrote. "Thank you Katy! Thank you L.A."

Best Unapologetic bitch ever! Thank you Katy! Thank you L.A. ❤️#rebelhearttour

A photo posted by Madonna (@madonna) on

Perry also shared some videos from her Rebel Heart dance party. "Well, that was unrehearsed but @madonna [is] my QUEEN," she Instagrammed.

Well, that was unrehearsed but 💅🏼 ILY @madonna my 👑QUEEN👑 #Repost @bahjournalist

A video posted by KATY PERRY (@katyperry) on

The "Roar" singer even got spanked by Madonna.

WATCH: Madonna Spanks Amy Schumer at Concert While Jennifer Lopez Looks More '90s Than Ever!

#Madonna #katyperry

A video posted by Tierney (@tiersz) on

#katyperry #Madonna

A video posted by Tierney (@tiersz) on

Perry also explained why she referred to Madonna as "mom" during the concert, quipping, "Because all pop stars are code 'mom.'"

Because all popstars are code "mom" #meta @madonna #Repost @tiersz

A video posted by KATY PERRY (@katyperry) on

While it's clear that these two are pals, Madonna also doesn't appear to have any bad blood towards Swift. In an interview with Rolling Stone magazine earlier this year, she even compared herself to the "Shake It Off" singer.

WATCH: Beyonce, Katy Perry and Nicki Minaj Declare 'B**ch I'm Madonna' in Star-Studded New Video

“She has an opinion, and she's going against the norm," Madonna told the mag. "So in that respect, she is similar to me, yeah. And also, people just want to give her a hard time all the time because they think she's a goody-two-shoes, so of course I want to embrace her."