Jessica Simpson was sent home from Cedars-Sinai Medical Center in Los Angeles after being treated for a kidney infection. In Touch was first to break the news that the star went to the hospital on Friday, after not feeling well. "She was hospitalized for a kidney infection, but she has been released and is doing fine,” her rep tells In Touch. “She checked in on Friday morning because she was feeling achy and had a fever,” a friend of the family says. “She is so happy she is out and feeling great.”