Madonna's younger brother, Christopher Ciccone, has died after a battle with cancer according to multiple reports. He was 63 years old. The pop star paid tribute to her brother on Instagram with an emotional and lengthy caption, opening up about their close bond and reconciling after having multiple public feuds between one another. Christopher served as Madonna's backup dancer at the start of her career and eventually became the art and tour director of some of her tours in the '90s. Source