POPSUGAR Celebrity Mary-Kate Olsen Slide Photo of Mary-Kate Olsen in NYC Dropping In by Celebrity 3/17/10 0 Shares Like us on Facebook Sign up for our daily newsletter > Mary-Kate Olsen stopped by her sister's NYC apartment on Tuesday. Image Source: INFphoto.com Read More HotMary-Kate Olsen Mary-Kate Olsen 13 Moments That Made Us Wish We Had a Stylish Sister by Our Side She Wore THAT? 25 Then-and-Now Style Pics From Your Favorite It Girls The Very Best Celebrity Engagement Rings Mary-Kate and Ashley Olsen Throw an Olympics-Themed Birthday Bash POPSUGAR, the #1 independent media and technology company for women. Where more than 75 million women go for original, inspirational content that feeds their passions and interests. Get the scoop with our daily newsletter Young Hollywood A-Listers TV Movies Sign up with By signing up, I agree to the Terms and to receive emails from POPSUGAR.