Mary-Kate Olsen was dressed for a couple different seasons while her boyfriend Nate Lowman could barely keep his shirt on for their walk in NYC today. He didn't join MK for the last night's festivities which included a boat party to celebrate Matthew Williamson for H&M. While Mary-Kate and her twin aren't yet on the list expected at Monday's Costume Institute Gala, hopefully, the girls will still make an appearance at the big event.
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