It's hard to think of a TV show that's offered up quite as many epic burns as "That '70s Show." Even though curmudgeonly patriarch Red Forman had some of the most memorable ones throughout the sitcom's run, pretty much every character got a chance to spit classic zingers at some point. Today is Laura Prepon's birthday and although she went on to star on "Orange Is the New Black," we'll always love her as Donna Pinciotti. Let's celebrate the actress today by going down TV memory lane and revisiting some truly great "That '70s Show" burns...