Article continues below advertisementMary-Kate and Ashley Olsen have things covered on both coasts!The famous twins, 39, doubled down on rare public appearances this week as they stepped out separately in New York City and Los Angeles for two different star-studded occasions.While Mary-Kate enjoyed herself at the US Open on Wednesday night, September 3, in NYC, Ashley and her husband, Louis Eisner, attended the YES Scholars 25th Anniversary Gala in Los Angeles on Thursday evening, September 4.