"I find that one of the most annoying verbal tics is the repeated use of the expression 'you know'—or y'know—by interviewees on TV or the radio. But the champion has to be Caroline Kennedy, who used the offending phrase 142 times in a single interview."
http://www.nytimes.com/2008/12/28/nyregion/28kennedy.html?_r=2&ref=nyregion
