Madonna’s Rebel Heart world tour has featured an A-list curtain call of “Unapologetic Bitch,” with the pop icon bringing out guests like Amy Schumer, Anderson Cooper and Diplo onstage. During Madonna’s Tuesday show in Los Angeles, Katy Perry joined the ranks, dancing and downing a shot from the now-standard banana flask. 

“I love you, mom!” Perry…

Source: RollingStone
Link: Watch Katy Perry Grind Madonna During Live 'Unapologetic Bitch'