http://universeharrypotter.com/News/keha-olsen-twin/ Filed under: Olsen Twins. , We're Just Sayin' Here's bubblegum pop newbie Ke$ha -- the chick who sings that "Tik Tok" song you can't get out of ya head -- at some event in NYC last month (left) and wonder twin Mary-Kate Olsen a few months ago (right)So far, only one has been to rehab.We're just . Permalink. Thu, 07 Jan 2010 21:16:58 CST en