Posted 14 minutes agoDavid Letterman Revealed The Celebrity He's Been Mistaken For, And It's Cracking Me UpDavid says he was confused for the person "just the other day" at the farmers market.by Chelsea StewartBuzzFeed StaffFacebookPinterestLink Quick - who is this? Slaven Vlasic / Getty Images And who is this? Randy Holmes / Getty Images If you guessed David Letterman and Dick Van Dyke, congratulations - you know your stuff. If you didn't, count yourself among the people who have confused the former talk show host for the soon-to-be 100-year-old icon.