Article continues below advertisementReal Housewives of New York City alum Carole Radziwill and famous crooner Harry Styles have become the talk of the town after they were seen at a wedding together. "I saw @caroleradziwill struggling to get her rather large @giambattistavalliparis dress up the grand stairwell. Naturally and quickly, I managed to get my iPhone out of my dinner clutch to document what could have been fashion Parisian castle roadkill," Cassandra Grey wrote on Instagram on September 1.