100-year-old Dorthy Parker will be back on the  Tonight show with Jay Leno this evening.  KTVB reports that when the centenarian sat down with Jay Leno in June, she made quite the impression.  The conversation from the fabled couch caused a considerable stir across the World Wide Web. She made such an impression on Leno, that they have invited her back to be "America's Sweetheart" on their Valentine's Day show. You can see her on Idaho's News Channel seven tonight at 10:30.