Madonna to Jessica Chastain After Concert Spanking: "You Were a Very Good B*tch"

Jessica Chastain took the stage in Prague on Saturday for Madonna's Rebel Heart tour. The stunning actress joined Madonna during "Unapologetic B*tch," which is oddly fitting because Jessica proceeded to dance wildly and spank the pop star midsong. In the wake of an introduction and raucous applause, Madonna told Jessica she was "a very good b*tch," and even called her "sexy and beautiful" in an Instagram post after the fact. Madonna's tour has been going for a solid two months now and has previously included the likes of Katy Perry and even comedian Amy Schumer as onstage guests. See the epic video clip above and Madonna's snap below, then read Jessica's recent, fresh take on feminism.