Over the weekend, a representative for the Queen of Pop's family announced that Anthony had died on Friday at the age of 66. No cause of death was given. Taking to her Instagram Stories on Monday, Madonna thanked her older sibling for introducing her to "expansive thinking". Alongside a black-and-white throwback photo showing the pair at a party, the singer wrote: "Thank you for blowing my mind as a young girl and introducing me to Charlie Parker, Miles David, Buddhism, Taoism, Charles Bukowski, Richard Brautigan, Jack Kerouac, expansive thinking, outside the box."