Martha Stewart needs to work harder on making a good first impression if she is to find true love. The domestic diva didn’t recognize Olympic gymnast Gabby Douglas as they sat together backstage at the “Today” show’s 30 Rock studio Monday morning. Sources tell us Stewart was thrown by Douglas, dressed in a suit and heels, and abruptly asked the petite athlete, “Who are you?” Douglas politely replied, “I’m Gabby.” Right before Stewart was to go on air, she realized who the little girl in the suit was. The media mogul, we’re told, was mortified, and tried to explain why she didn’t recognize her. “I didn’t recognize you with clothes on,” she quipped (not a good line for match.com dates). Stewart’s rep confirmed the incident, adding: “Martha was accustomed to seeing Gabby in her Olympic unitard and her gold medal.” The 71-year-old Stewart told Matt Lauer on Monday she was joining a dating site because, “I’d like to have breakfast with somebody. I’d like to go to bed with somebody. Sleep with somebody.”