'Hi, I'm Jay-Z's Sister,' Says Insane Woman on the News 23.09K Max Read 12/14/12 10:49AM Filed to: Bloopers Bloopers News Jay-Z sister Nbc4 Jay-Z, were you looking for your sister on the subway? If you were, she's here, on NBC4 New York, in the middle of segment about the LIRR.