MKOLSEN111307_01.jpgMary-Kate Olsen MKOLSEN111307_03.jpgOh no - People is reporting that Mary-Kate Olsen went to the emergency room last night with a kidney infection! Luckily, her rep says she shouldn't be out of action for too long - she's quoted as saying "She's resting comfortably and will be released in the next day or so." Get better soon, MK - there's nothing worse than being sick around the holidays!