Mary-Kate Olsen has been hospitalized with a kidney infection. The twin mogul, who recently snagged a role on Weeds, went to the emergency room on Monday and, after, was admitted to New York Hospital. "Mary Kate got a kidney infection," her rep, Nicole Caruso, told People. "She's resting comfortably and will be released in the next day or so." That sucks -- but I'm sure Mary-Kate isn't lonely in the hospital. Twin sis Ashley Olsen must be visiting constantly and maybe she's even bringing her new man, Lance Armstrong. Lance could help pass the time by telling the girls stories of the olden days, like when he had to bike to school in 10 feet of snow.