YouTube has launched YouTube Charts , a destination for users to see how popular videos are performing. "What's the latest in the all-time most viewed video smackdown between Bieber and Gaga? Is David After Dentist pwning Charlie Bit My Finger? Who grabbed more subscribers this month, ShayCarl or Annoying Orange?" writes YouTube Product Manager Matt Darby. "These are the big questions on the lips of the YouTube community," he says. "To help answer them,